awesome-scala

A curated list of awesome Scala frameworks, libraries and software.

Learning and Reference
- Tutorials and Books
- Examples and Exercises
Language and Tooling
Web
Data and Storage
Machine Learning and AI
- Machine Learning Frameworks
- Data Science and Analytics
Networking and Distributed
User Interface
- Terminal and Console UI
- Applications and End User Tools
Graphics and Media
- Game Development
Security
- Security Tools
- Authentication and Authorization
Concurrency and Performance
- Concurrency and Parallelism
- Performance and Optimization
Testing and Quality
- Testing
Utilities
Science and Math
Other

Learning and Reference

Tutorials and Books

ochrons/scalajs-spa-tutorial - Tutorial for creating a simple Single Page Application in ScalaJS
dehun/learn-fp - learn-by-doing course/tutorial for functional programming on scala
slouc/concurrency-in-scala-with-ce - Introduction to concepts of asynchronous and concurrent programming in Scala, based on the Cats Effect library.
mbonaci/scala - Scala reference (as seen by Java developer)
lemastero/scala_typeclassopedia - Abstractions from Category theory with simple description & implementation, links to further resources.
Baeldung/scala-tutorials - Supporting code for the tutorials on https://www.baeldung.com/scala
twitter/scala_school2 - Scala School 2
rockthejvm/scala-2-beginners - The official repository for the Rock the JVM Scala 2 for beginners course
rockthejvm/scala-at-light-speed - The repository for the free Scala at Light Speed mini-course
rockthejvm/spark-essentials - The official repository for the Rock the JVM Spark Essentials with Scala course
EffectOrientedProgramming/book - Effect-Oriented Programming: Creating Reliable Systems with Scala 3 and ZIO 2
scalacenter/scala-3-migration-guide - The Scala 3 migration guide for everyone.
creativescala/creative-scala - Quick, graphical, fun introduction to programming in Scala.
lunatech-labs/lunatech-scala2-to-scala3-course - Lunatech course - "Moving forward from Scala 2 to Scala 3" (archived)
opensourceteams/spark-scala-maven-2.4.0 - Spark2.4.0 学习笔记分享
makingthematrix/scalaonandroid - A tutorial and examples of how to write Android apps in Scala 2.13 and Scala 3.
bizreach-inc/play2-hands-on - Play2 + Slick / ScalikeJDBCを使ってWebアプリケーションを作成するハンズオンです。
jdegoes/functional-scala - The repository for the Functional Scala workshop.
jdegoes/lambdaconf-2014-introgame - Online material for the Introduction to Functional Game Programming with Scala workshop.
rockthejvm/scala-2-advanced - The Scala 2 version (old) of the Advanced Scala course
lihaoyi/hands-on-scala-js - Better documentation for Scala.js
evolution-gaming/scala-bootcamp - Scala Bootcamp (archived, no longer maintained) (archived)
yareally/android-scala-intellij-no-sbt-plugin - Directions on how to create a Scala based project in Intellij IDEA without having to resort to additional plugins or external building that cripples the nice features of the IDE.
darrenjw/scala-course - Scala for Statistical Computing and Data Science Short Course
jleetutorial/scala-spark-tutorial - Project for James' Apache Spark with Scala course
scala-lms/tutorials - Tutorials on Lightweight Modular Staging
SidneyXu/JGSK - Java,Groovy,Scala,Kotlin 四种语言的特点对比
ashwinbhaskar/scala-to-dotty - Dotty way of writing Scala 2 code
ktonga/reactive-turtle - Scala and Akka for kids. A Functional Programming approach for the well known LOGO.
underscoreio/essential-scala - Source code for Underscore's Essential Scala
microsoft/Azure-Databricks-NYC-Taxi-Workshop - An Azure Databricks workshop leveraging the New York Taxi and Limousine Commission Trip Records dataset (archived)
scalasummerschool/lectures - Learn Functional Programming in Scala
scalawarrior/scalawarrior - Game written in Scala for learning Scala.

Examples and Exercises

fpinscala/fpinscala - Code, exercises, answers, and hints to go along with the book "Functional Programming in Scala"
scala-exercises/scala-exercises - The easy way to learn Scala.
vkostyukov/scalacaster - Purely Functional Algorithms and Data Structures in Scala
TheAlgorithms/Scala - All Algorithms implemented in Scala
jacksu/utils4s - scala、spark使用过程中，各种测试用例以及相关资料整理
pauljamescleary/scala-pet-store - An implementation of the java pet store using FP techniques in scala
softwaremill/bootzooka - Template project to quickly start developing a Scala-based microservice or web application, with the build & project structure provided
theiterators/akka-http-microservice - Example of http (micro)service in Scala & akka-http
miguno/kafka-storm-starter - [PROJECT IS NO LONGER MAINTAINED] Code examples that show to integrate Apache Kafka 0.8+ with Apache Storm 0.9+ and Apache Spark Streaming 1.1+, while using Apache Avro as the data serialization format. (archived)
handsonscala/handsonscala - Discussion and and code examples for the book Hands-on Scala Programming
gvolpe/trading - 💱 Trading application written in Scala 3 that showcases an Event-Driven Architecture (EDA) and Functional Programming (FP)
deanwampler/programming-scala-book-code-examples - The code examples used in Programming Scala, 2nd and 3rd Editions (O'Reilly)
spark-examples/spark-scala-examples - This project provides Apache Spark SQL, RDD, DataFrame and Dataset examples in Scala language
gvolpe/pfps-shopping-cart - :shopping_cart: The Shopping Cart application developed in the book "Practical FP in Scala: A hands-on approach"
fosskers/scalaz-and-cats - Usage examples and benchmarks between Scalaz and Cats (w/ Haskell ground-truth).
spirom/LearningSpark - Scala examples for learning to use Spark
pathikrit/scalgos - algorithms in scala
vmunier/play-scalajs.g8 - Giter8 template to get started with Play and Scala.js.
streaming-with-flink/examples-scala - Stream Processing with Apache Flink - Scala Examples
matthiasn/sse-chat - Chat example app using Server Sent Events plus REST calls. Scala, Play Framework 2.3, AngularJS or React (alternatively).
bytedeco/javacv-examples - Examples of using JavaCV / OpenCV library on Java Virtual Machine
jrudolph/pekko-http-scala-js-websocket-chat - An example app that integrates pekko-http and scala-js to implement a websocket chat
scala/scala3-example-project - An example sbt project that compiles using Dotty
spotify/big-data-rosetta-code - Code snippets for solving common big data problems in various platforms. Inspired by Rosetta Code
garyaiki/Scala-Algorithms - Scala translations of Robert Sedgewick's Java Algorthms
scala-labs/scala-labs - A collection of hands-on programming exercises aimed at teaching you to program in Scala
kyleu/boilerplay - Using the latest technology in the Scala ecosystem, Boilerplay is a reactive web application built on Play Framework, ScalaJS, Silhouette, Sangria/GraphQL, and PostgreSQL. It provides a good starting point for whatever you want to build.
typelevel/CT_from_Programmers.scala - Scala sample code for Bartosz Milewski's CT for Programmers (archived)
playforscala/sample-applications - Sample applications that go with the book Play for Scala
jaceklaskowski/scalania - Learn Scala by examples
theiterators/reactive-microservices - Project showcasing different microservice communication styles using Scala, Akka, Play and other tools from Scala ecosystem
codeport/scala - LascoDan(Korea Scala Group) scala study
concurrent-programming-in-scala/learning-examples - Code examples for the book Learning Concurrent Programming in Scala
playframework/play-scala-rest-api-example - Example Play Scala application showing REST API (archived)
daizikaikou/learningSpark - 学习spark写的scala代码，工具使用的是IDEA2017.1.6,欢迎star
josephguan/scala-design-patterns - Design patterns implemented in Scala.
lihaoyi/workbench-example-app - An example application written in ScalaJS using scala-js-dom and scala-js-workbench
Algomancer/Full-Stack-Scala-Starter - Play 2.5, ScalaJS, Binding.scala starter project.
gvolpe/pfps-examples - :izakaya_lantern: Standalone examples shown in the book "Practical FP in Scala: A hands-on approach"
spirom/spark-streaming-with-kafka - Self-contained examples of Apache Spark streaming integrated with Apache Kafka.
SidneyXu/AndroidDemoIn4Languages - Comparison among Java, Groovy, Scala, Kotlin in Android Development.
playframework/play-scala-websocket-example - Example Play Scala application showing WebSocket use with Akka actors (archived)
ilya-klyuchnikov/tapl-scala - Code from the book "Types and Programming Languages" in Scala
jaspervz/todo-http4s-doobie - A sample project of a microservice using http4s, doobie, and circe.
wiringbits/scala-webapp-template - A pragmatic skeleton to build web applications in Scala/Scala.js, including user registration, login, admin portal, and, deployments
eligosource/eventsourced-example - A Scala web application demonstrating event-sourcing best practices
miciek/grokkingfp-examples - All examples and exercises from the Grokking Functional Programming book
lamdor/scala-koans - The Scala Koans
ReactivePlatform/Pragmatic-Scala - Pragmatic Scala 中文版——《Scala实用指南》代码清单（包含 SBT 版本（切到sbt分支））
pbassiner/sbt-multi-project-example - sbt multi-project example
mariussoutier/PlayBasics - Example code for my tutorial series about Play Framework 2.x
sjrd/scala-js-example-app - Example application built with Scala.js (archived)
scala-exercises/exercises-scalatutorial - Exercises for the "Functional Programming Principles in Scala", part of the FP in Scala specialized program by EPFL.
scala-exercises/exercises-stdlib - Scala Exercises' lessons for the standard library
scala/scala-seed.g8 - Giter8 template for a simple hello world app in Scala.
gothinkster/scala-play-realworld-example-app - Exemplary real world application built with Scala 2.13 & Play (archived)
playframework/play-scala-isolated-slick-example - Example Play Slick Project (archived)
retronym/macrocosm - Exploration of Scala macros
vasnake/Principles-of-Reactive-Programming - Principles of Reactive Programming, Scala: assignments and other code from Coursera https://class.coursera.org/reactive-002
prnicolas/ScalaMl - Project, source code and data files for 1st edition "Scala for Machine Learning"
underscoreio/essential-macros - Examples of simple Scala Macros
yawaramin/scala-modules - Experimental implementations of ML-style modules in Scala
crossroad0201/ddd-on-scala - DDD sample implementation by Scala.
CodelyTV/scala-ddd-example - λ🎯 Hexagonal Architecture + DDD + CQRS applied in Scala using Akka HTTP
xebia-functional/scala-android - Scala on Android Examples
scalafx/scalafx-ensemble - scalafx ensemble
ashwinbhaskar/functional-way - Write small programs (eg -algorithms) in a functional way.
taoran92/SwordOffer - :fire:剑指offer题解（Java & Scala实现）
exercism/scala - Exercism exercises in Scala.
hussachai/play-scalajs-showcase - Play+Scala.js Showcase
GrahamLea/scala-spring-hibernate-maven-webapp - [ARCHIVED] Code for kickstarting a webapp using Scala + Spring + Hibernate + Maven + Selenium WebDriver PageObject Web Tests (archived)
kogecoo/dl4j-examples-scala - [NO LONGER MAINTAINED] a simple scala porting of https://github.com/deeplearning4j/dl4j-examples (archived)
loicdescotte/pureWebappSample - Minimal http4s + Doobie + ZIO + Circe Scala application to show how to build a purely functional web application in Scala.
Sergey80/scala-samples - There are pieces of scala code that explain Scala syntax and related things - like what you can do with all this
MasseGuillaume/ScalaKata - Moved
nraychaudhuri/scalainaction - Code examples from scala in action book
potigol/beecrowd - 800+ Soluções de Problemas do Beecrowd usando a Linguagem Potigol
vmunier/akka-http-scalajs.g8 - Giter8 template to get started with Akka HTTP and Scala.js.
debasishg/frdomain-extras - Additional accompaniment to Functional and Reactive Domain Modeling
jsuereth/scala-in-depth-source - The source code for the Scala In Depth book.
scala-exercises/exercises-cats - Scala Exercises' lessons for the Cats library
fernandoracca/skeleton - Simple Scala project template
lihaoyi/scala-js-games - Some simple games ported to Scala-Js
hempalex/scala-impatient - My solutions for "Scala for the Impatient" exercises
pbugnion/s4ds - Code samples for Scala for data science
scala/scala-module-dependency-sample - Depend on Scala modules like a pro (archived)
djspiewak/extreme-cleverness - A set of functional collections created, ported and modified for my tak at NE Scala 2011
tonyskn/coursera-scala - My solutions to Coursera's "Functional Programming in Scala"
AtomicScala/atomic-scala-examples - Examples from the book "Atomic Scala" 2nd Edition by Bruce Eckel & Dianne Marsh

Language and Tooling

Compilers and Interpreters

scala/scala - Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3
scala/scala3 - The Scala 3 compiler, also known as Dotty.
chipsalliance/chisel - Chisel: A Modern Hardware Design Language
scala-js/scala-js - Scala.js, the Scala to JavaScript compiler
scala-native/scala-native - Your favorite language gets closer to bare metal.
com-lihaoyi/Ammonite - Scala Scripting
SpinalHDL/SpinalHDL - Scala based HDL
twitter/rsc - Experimental Scala compiler focused on compilation speed
lihaoyi/Metascala - A JVM written in Scala
scalameta/scalameta - Library to read, analyze, transform and generate Scala programs
oleg-py/better-monadic-for - Desugaring scala for without implicit withFilters
tek/splain - better implicit errors for scala
scala/legacy-svn-scala - OBSOLETE, we're over there: (archived)
sbt/zinc - Scala incremental compiler library, used by sbt and other build tools
databricks/sjsonnet - A Scala implementation of the Jsonnet configuration language, running on JVM, GraalVM, Scala Native and JavaScript.
softwaremill/scala-clippy - Good advice for Scala compiler errors (archived)
typesafehub/zinc - ⛔️ [DEPRECATED] sbt's scala incremental compiler (archived)
potigol/potigol - Linguagem Potigol - Linguagem de programação funcional moderna para iniciantes - A Functional Programming Language for Beginners
scala-ts/scala-ts - :wrench: Scala datamodel transpiler
ghik/silencer - Scala compiler plugin for warning suppression
fogus/baysick - An embedded Insane-specific Language for Scala implementing the BASIC programming language
ScalablyTyped/Converter - Typescript to Scala.js converter
sjrd/scala-js-ts-importer - TypeScript Importer for Scala.js
timowest/scalagen - Java to Scala transformation
nativelibs4java/Scalaxy - Compiler plugin goodies for Scala (continuation of non-OpenCL part of ScalaCL)
epfldata/squid - Squid – type-safe metaprogramming and compilation framework for Scala
nau/jscala - Scala macro that produces JavaScript from Scala code.
japgolly/scala-graal - Make usage of Graal features easy and safe from Scala. Also features Scala-based React SSR.
gkossakowski/kentuckymule - Limits of Scala typechecking speed
lihaoyi/Scalite - An experimental whitespace-delimited syntax for the Scala programming language
camunda/feel-scala - FEEL parser and interpreter written in Scala
eed3si9n/treehugger - treehugger.scala is a library to code Scala programmatically.
scalacenter/macros - Archived - Scala Macros (archived)
guillaumebort/scasm - A a dynamic x86_64 assembler in Scala — Code for the live coding session @ Devoxx france 2016
polyvariant/better-tostring - (b2s) Scala compiler plugin for a better default toString.
shadaj/scala-native-wasm - Running Scala in WebAssembly through Scala Native
stephentu/scala-sql-parser - SQL parser written using Scala's parser combinator library
magarciaEPFL/scaladotnet - Scala SDK (compiler and standard library) for .NET
scalan/scalan - Generic framework for development of domain-specific compilers in Scala
scala/scala-continuations - the Scala delimited continuations plugin and library (archived)

Build Systems

sbt/sbt - sbt, the interactive build tool
com-lihaoyi/mill - A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-7x faster dev workflows than other JVM build tools
sbt/sbt-native-packager - sbt Native Packager
scalacenter/bloop - Bloop is a build server and CLI tool to compile, test and run Scala fast from any editor or build tool.
spray/sbt-revolver - An SBT plugin for dangerously fast development turnaround in Scala
marcus-drake/sbt-docker - Create Docker images directly from sbt
sbt/sbt-release - A release plugin for sbt
VirtusLab/scala-cli - Scala CLI is a command-line tool to interact with the Scala language. It lets you compile, run, test, and package your Scala code (and more!)
build-server-protocol/build-server-protocol - Protocol for IDEs and build tools to communicate about compile, run, test, debug and more.
xerial/sbt-pack - A sbt plugin for creating distributable Scala packages.
cvogt/cbt - CBT - fun, fast, intuitive, compositional, statically checked builds written in Scala
jberkel/android-plugin - An sbt plugin for Android development in Scala (archived)
propensive/fury-old - A new build tool for JVM languages
typelevel/sbt-tpolecat - scalac options for the enlightened
scalameta/sbt-native-image - Plugin to generate native-image binaries with sbt
portable-scala/sbt-crossproject - Cross-platform compilation support for sbt.
tindzk/seed - Build tool for Scala projects
lihaoyi/workbench - Tooling around scala-js
sbt/sbt-fresh - sbt-plugin to create an opinionated fresh sbt project
vmunier/sbt-web-scalajs - SBT plugin to use Scala.js along with any sbt-web server.
sbt/sbt-header - sbt-header is an sbt plugin for creating file headers, e.g. copyright headers
typelevel/sbt-typelevel - Let sbt work for you.
oyvindberg/bleep - A bleeping fast JVM build tool!
sbt/sbt-site - Site generation for sbt
sbt/sbt-protobuf - sbt plugin for compiling protobuf files
sbt/sbt-jni - SBT Plugin to ease working with JNI
julianpeeters/sbt-avrohugger - sbt plugin for generating Scala sources for Apache Avro schemas and protocols.
sbt/sbt-unidoc - sbt plugin to create a unified Scaladoc or Javadoc API document across multiple subprojects.
kitlangton/zio-app - Quickly create and develop full-stack Scala apps with ZIO and Laminar.
davidB/scala-archetype-simple - a simple maven archetype for project in scala (archived)
sbt/sbt-boilerplate - sbt plugin for generating scala.Tuple/Function related boilerplate code
agemooij/sbt-prompt - An SBT plugin for making your SBT prompt more awesome
xuwei-k/sbt-class-diagram - sbt plugin to create a class diagram

Package Management

coursier/coursier - Pure Scala Artifact Fetching
sbt/sbt-dependency-graph - sbt plugin to create a dependency graph for your project (archived)
scala-steward-org/scala-steward - :robot: A bot that helps you keep your projects up-to-date
rtimush/sbt-updates - sbt plugin that can check Maven and Ivy repositories for dependency updates
foundweekends/conscript - Scala at your command
xerial/sbt-sonatype - A sbt plugin for publishing Scala/Java projects to the Maven central.
scala/scala-dist - sbt project that packages the Scala 2 distribution
scalacenter/scaladex - The Scala Package Index
tpunder/fm-sbt-s3-resolver - SBT Plugin that adds support for resolving and publishing using Amazon S3
kitlangton/scala-update - Update your Scala dependencies interactively
ohnosequences/sbt-s3-resolver - :cloud:Amazon S3-based resolver for sbt
jvican/sbt-release-early - Opinionated sbt plugin to release your artifacts early, both on merge and via git tag.

Linters and Formatters

scalameta/scalafmt - Code formatter for Scala
wartremover/wartremover - Flexible Scala code linting tool
scalacenter/scalafix - Refactoring and linting tool for Scala
scalastyle/scalastyle - scalastyle
scapegoat-scala/scapegoat - Scala compiler plugin for static code analysis
scala-ide/scalariform - Scala source code formatter
scala-garden/mima - A tool for catching binary incompatibility in Scala
riy/degraph - Test and Visualize and Manage Dependencies of classes and packages in JVM Byte Code (think Scala and Java)
HairyFotr/linter - Static Analysis Compiler Plugin for Scala (archived)
sbt/sbt-scalariform - sbt plugin adding support for source code formatting using Scalariform
com-lihaoyi/acyclic - Acyclic is a Scala compiler plugin to let you prohibit circular dependencies between files
scalameta/sbt-scalafmt - sbt plugin for Scalafmt
scala/scala-abide - obsolete; visit https://github.com/scalacenter/scalafix instead (archived)
liancheng/scalafix-organize-imports - A CI-friendly Scalafix semantic rule for organizing imports (archived)
scapegoat-scala/sbt-scapegoat - sbt plugin for scapegoat scala static analysis plugin
lucidsoftware/neo-sbt-scalafmt - Scalafmt SBT plugin
mikeyhu/scaladiagrams - Generate class diagrams from scala source code
scalastyle/scalastyle-sbt-plugin - scalastyle-sbt-plugin
scalacenter/sbt-scalafix - sbt plugin for Scalafix
scala-garden/scala-sculpt - Dependency extraction for Scala 2 codebases, to aid in modularizing
sonar-scala/sonar-scala - A free and open-source SonarQube plugin for static code analysis of Scala projects. (archived)
codacy/codacy-analysis-cli - The Codacy Analysis CLI is a command line interface that enables you to execute Codacy code analysis locally.
scalacenter/scala3-migrate - A tool to help migrating from Scala 2 to Scala 3
rorygraves/ScalaClean - Full program static analysis for Scala

Editor and IDE Support

scalameta/metals - Scala language server with rich IDE features 🚀
JetBrains/intellij-scala - Scala plugin for IntelliJ IDEA
scala-ide/scala-ide - Scala IDE for Eclipse
psliwa/idea-composer-plugin - PhpStorm plugin that adds code completion in composer.json file
zio/zio-intellij - A companion IntelliJ IDEA plugin for the ZIO library ecosystem.
harrah/browse - A Scala source code browser
scalameta/metabrowse - Static site generator for code search with IDE features for Scala
scala-ide/scala-ide-play2 - Play 2 support for Scala IDE
scalafiddle/scalafiddle-editor - Web user interface for ScalaFiddle
scala-ide/scala-worksheet - A Scala IDE plugin for a multi-line REPL (called worksheet)
JetBrains/intellij-scala-bundle - [Retired] IntelliJ Scala Bundle - historical experimental distribution (archived)

Web

Web Frameworks

playframework/playframework - The Community Maintained High Velocity Web Framework For Java and Scala.
scalatra/scalatra - Tiny Scala high-performance, async web framework, inspired by Sinatra
lagom/lagom - Reactive Microservices for the JVM
http4s/http4s - A minimal, idiomatic Scala interface for HTTP
spray/spray - A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable (archived)
twitter/finatra - Fast, testable, Scala services built on TwitterServer and Finagle
finagle/finch - Scala combinator library for building Finagle HTTP services
lift/framework - Lift Framework
tumblr/colossus - I/O and Microservice library for Scala
zio/zio-http - A next-generation Scala framework for building scalable, correct, and efficient HTTP clients and servers
skinny-framework/skinny-framework - :monorail: "Scala on Rails" - A full-stack web app framework for rapid development in Scala
jdegoes/blueeyes - A lightweight Web 3.0 framework for Scala, featuring a purely asynchronous architecture, extremely high-performance, massive scalability, high usability, and a functional, composable design.
unfiltered/unfiltered - A toolkit for servicing HTTP requests in Scala
com-lihaoyi/cask - Cask: a Scala HTTP micro-framework. Cask makes it easy to set up a website, backend server, or REST API using Scala
fomkin/korolev - Single Page Applications running on the server side. (archived)
UdashFramework/udash-core - Scala framework for building beautiful and maintainable web applications.
xitrum-framework/xitrum - Async and clustered Scala web framework and HTTP(S) server
brikis98/ping-play - BigPipe streaming for the Play Framework
d2iq-archive/chaos - A lightweight framework for writing REST services in Scala. (archived)
outr/youi - Next generation user interface and application development in Scala and Scala.js for web, mobile, and desktop.
mDialog/smoke - Simple, asynchronous HTTP using Scala. (archived)
inca/circumflex - [UNMAINTAINED] Circumflex — lightweight Scala-based Web application framework and ORM (archived)
Kanaka-io/play-monadic-actions - A simple scala DSL to allow clean and monadic style for Play! Actions
reactiverse/vertx-lang-scala - Vert.x for Scala
bowler-framework/Bowler - RESTful Web Framework based on Scala, built on top of Scalatra & Scalate
daviddenton/fintrospect - Implement fast, type-safe HTTP webservices for Finagle

HTTP and Networking Clients

softwaremill/sttp - The Scala HTTP client you always wanted!
scalaj/scalaj-http - Simple scala wrapper for HttpURLConnection. OAuth included. (archived)
com-lihaoyi/requests-scala - A Scala port of the popular Python Requests HTTP client: flexible, intuitive, and straightforward to use.
dispatch/reboot - Scala wrapper for the Java AsyncHttpClient.
dispatch/classic - [UNSUPPORTED] Dispatch Classic. See dispatch/reboot for the modern Dispatch for Scala 2.11/2.12 (archived)
DanielaSfregola/twitter4s - An asynchronous non-blocking Scala client for both the Twitter Rest and Streaming API (archived)
47degrees/github4s - A GitHub API wrapper written in Scala
playframework/play-ws - Standalone Play WS, an async HTTP client with fluent API
slack-scala-client/slack-scala-client - A scala library for interacting with the slack api and real time messaging interface
pepegar/hammock - Purely functional HTTP client
finagle/featherbed - Asynchronous Scala HTTP client using Finagle, Shapeless and Cats
eed3si9n/gigahorse - Gigahorse is an HTTP client for Scala with multiple backend support.
hmil/RosHTTP - Unified Scala.js + Scala HTTP client API

API and GraphQL

sangria-graphql/sangria - Scala GraphQL implementation
softwaremill/tapir - Rapid development of self-documenting APIs
ghostdogpr/caliban - Functional GraphQL library for Scala
guardrail-dev/guardrail - Principled code generation from OpenAPI specifications
endpoints4s/endpoints4s - Describe HTTP endpoints in Scala and derive clients, servers, and documentation
disneystreaming/smithy4s - https://disneystreaming.github.io/smithy4s/
iheartradio/play-swagger - Swagger spec generator for play framework
swagger-akka-http/swagger-akka-http - Support for generating Swagger REST API documentation for Akka-Http based services.
RazorSh4rk/random-word-api - Simple scala rest api that serves random words
pathikrit/metarest - Scala macros to generate RESTful Models
pheymann/typedapi - Build your web API on the type level.
tofu-tf/typed-schema - Typelevel http service definition DSL (archived)
ebowman/api-first-hand - API-First bootstrapping tool for building RESTful web services from a Swagger/OpenAPI spec
swagger-api/swagger-scala-module - Swagger support for scala (archived)
Tinkoff/typed-schema - Typelevel http service definition DSL (archived)

Frontend and UI Components

japgolly/scalajs-react - Facebook's React on Scala.JS
ThoughtWorksInc/Binding.scala - Reactive data-binding for Scala
raquo/Laminar - Simple, expressive, and safe UI library for Scala.js
shadaj/slinky - Write Scala.js React apps just like you would in ES6
suzaku-io/diode - Scala library for managing immutable application model
outwatch/outwatch - The Functional and Reactive Web-Frontend Library for Scala.js
PurpleKingdomGames/tyrian - Elm-inspired Scala UI library. (archived)
japgolly/scalacss - Super type-safe CSS for Scala and Scala.JS.
scala-js/scala-js-dom - Statically typed DOM API for Scala.js
softwaremill/supler - Rapid Form Development library. Use your favourite JS frontend & Scala backend frameworks. (archived)
raquo/Airstream - State propagation and event streams with mandatory ownership and no glitches
greencatsoft/scalajs-angular - AngularJS Binding for Scala.js (archived)
OlivierBlanvillain/monadic-html - Tiny DOM binding library for Scala.js
chandu0101/scalajs-react-components - Reusable scalajs-react components
armanbilge/calico - Pure, reactive UI library for Scala.js
widok/widok - Reactive web framework for the JVM and Scala.js
xored/scala-js-react - ScalaJS interface for Facebook React
Ahnfelt/react4s - Production ready React wrapper for Scala.js - composable lifecycle - no memoization, no macros, no implicits.
henrikerola/scaladin - Scala API for Vaadin Framework
julienrf/scalm - Elm-inspired Scala library for writing web user interfaces
fancellu/scalajs-vue - Scala.js bindings for Vue.js and an example application
suzaku-io/suzaku - Suzaku web UI framework for Scala
spaced/scala-js-d3 - d3 facade types for Scala.js (archived)

Web Servers and Proxies

MAIF/otoroshi - Lightweight api management on top of a modern http reverse proxy
mashupbots/socko - A Scala web server powered by Netty networking and AKKA processing.
lichess-org/lila-ws - Lichess' websocket server
spray/spray-can - A low-overhead, high-performance, fully async HTTP 1.1 server and client library implemented entirely in Scala on top of Akka
lolgab/snunit - Scala Native HTTP server based on FreeUnit
Spinoco/fs2-http - Http Server and client using fs2
polynote/uzhttp - Minimal HTTP server for Scala+ZIO
criteo/lolhttp - An HTTP Server and Client library for Scala.

Data and Storage

Databases

filodb/FiloDB - Distributed Prometheus time series database
apache/carbondata - High performance data store solution
thatdot/quine - Quine • the streaming graph • https://quine.io • Discord: https://discord.gg/GMhd8TE4MR
opencypher/morpheus - Morpheus brings the leading graph query language, Cypher, onto the leading distributed processing platform, Spark.
BlueBrain/nexus - Blue Brain Nexus - A knowledge graph for data-driven science
simerplaha/SwayDB - Persistent and in-memory key-value storage engine for JVM that scales on a single machine.
justin-db/JustinDB - ⚛️ JustinDB is a highly available globally distributed key-value data store.

Database Clients and ORMs

slick/slick - Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala
typelevel/doobie - Functional JDBC layer for Scala.
zio/zio-quill - Compile-time Language Integrated Queries for Scala
apache/cassandra-spark-connector - Apache Spark to Apache Cassandra connector
typelevel/skunk - A data access library for Scala + Postgres.
Philippus/elastic4s - 🔍 Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client
mauricio/postgresql-async - Async, Netty based, database drivers for PostgreSQL and MySQL written in Scala (archived)
scalikejdbc/scalikejdbc - A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.
outworkers/phantom - Schema safe, type-safe, reactive Scala driver for Cassandra/Datastax Enterprise
ReactiveMongo/ReactiveMongo - :leaves: Non-blocking, Reactive MongoDB Driver for Scala
tminglei/slick-pg - Slick extensions for PostgreSQL
playframework/play-slick - Slick Plugin for Play
etaty/rediscala - Non-blocking, Reactive Redis driver for Scala (with Sentinel support)
squeryl/squeryl - A Scala DSL for talking with databases with minimum verbosity and maximum type safety
mpollmeier/gremlin-scala - [unmaintained] Scala wrapper for Apache TinkerPop 3 Graph DSL
ReactiveMongo/Play-ReactiveMongo - :leaves: ReactiveMongo plugin for Playframework
profunktor/redis4cats - :bookmark: Redis client built on top of Cats Effect, Fs2 and Lettuce
aselab/scala-activerecord - ActiveRecord-like ORM library for Scala
scanamo/scanamo - Simpler DynamoDB access for Scala
scalikejdbc/scalikejdbc-async - ScalikeJDBC Extension: Non-blocking APIs in the JDBC way
akka/akka-persistence-jdbc - Asynchronously writes journal and snapshot entries to configured JDBC databases so that Akka Actors can recover state
fwbrasil/activate - Abandoned: Pluggable persistence in Scala
jonifreeman/sqltyped - Embedding SQL as an external DSL into Scala
AugustNagro/magnum - A 'new look' for database access in Scala
mongodb/mongo-scala-driver - Former repository of MongoDB Scala driver. Official Scala driver can now be found here: https://github.com/mongodb/mongo-java-driver (archived)
hbase-rdd/hbase-rdd - Spark RDD to read, write and delete from HBase
com-lihaoyi/scalasql - Scala ORM to query SQL databases from Scala via concise, type-safe, and familiar case classes and collection operations. Connects to Postgres, MySql, H2, and Sqlite out of the box
playframework/anorm - The Anorm database library
twitter-archive/cassie - A Scala client for Cassandra (archived)
sorm/sorm - A functional boilerplate-free Scala ORM (archived)
zio-archive/zio-sql - Type-safe, composable SQL for ZIO applications (archived)
zio/zio-protoquill - Quill for Scala 3
FaKod/neo4j-scala - Scala wrapper for Neo4j Graph Database
debasishg/scala-redis-nb - Implementation of a non blocking Redis client in Scala using Akka IO
lastland/scala-forklift - Type-safe data migration tool for Slick, Git and beyond.
neotypes/neotypes - Scala lightweight, type-safe, asynchronous driver for neo4j
lucidsoftware/relate - Performant database access in Scala
underscoreio/slickless - Support for shapeless HLists/Generics in Slick.
gaelrenoux/tranzactio - ZIO wrapper around Doobie and Anorm.
mybatis/scala - The Scala version of MyBatis SQL Mapper
Livestream/scredis - Non-blocking, ultra-fast Scala Redis client built on top of Akka IO, used in production at Livestream
bwmcadams/hammersmith - Pure asynchronous MongoDB Driver for Scala.
schemasafe/troy - Type-safe and Schema-safe Scala wrapper for Cassandra driver
acrosa/scala-redis - A scala library for connecting to a redis server, or a cluster of redis nodes using consistent hashing on the client side.
scredis/scredis - Non-blocking, ultra-fast Scala Redis client built on top of Akka IO.
sbt/flyway-sbt - An sbt plugin for Flyway database migration
dwhjames/datomisca - Datomisca: a Scala API for Datomic
GravityLabs/HPaste - HBase DSL for Scala with MapReduce support (archived)
AnormCypher/AnormCypher - Neo4j Scala library based on Anorm in the Play Framework
Kirill5k/mongo4cats - MongoDB Java client wrapper for Cats Effect & FS2 and ZIO
nafg/slick-migration-api - Schema manipulation dialects and DSL for Slick
paulgoldbaum/scala-influxdb-client - Asynchronous InfluxDB client for Scala
gonmarques/slick-repo - CRUD Repositories for Slick based persistence Scala projects.
crobox/clickhouse-scala-client - Clickhouse Scala Client with Reactive Streams support
ing-bank/scruid - Scala + Druid: Scruid. A library that allows you to compose queries in Scala, and parse the result back into typesafe classes.
okumin/akka-persistence-sql-async - A journal and snapshot store plugin for akka-persistence using RDBMS.
gideondk/Raiku - A non-blocking - Akka IO driven - Riak client for Scala with a cute DSL
typr-dev/typr - Seal Your System's Boundaries
outworkers/morpheus - Reactive type-safe Scala driver for SQL databases
longevityframework/longevity - A Persistence Framework for Scala and NoSQL
krasserm/akka-stream-eventsourcing - Event sourcing for Akka Streams
lendup/fs2-blobstore - Minimal, idiomatic, stream-based Scala interface for key/value store implementations

Serialization and Formats

circe/circe - Yet another JSON library for Scala
json4s/json4s - JSON library
scalapb/ScalaPB - Protocol buffer compiler for Scala.
spray/spray-json - A lightweight, clean and simple JSON implementation in Scala
scala/pickling - Fast, customizable, boilerplate-free pickling support for Scala (archived)
plokhotnyuk/jsoniter-scala - Scala macros for compile-time generation of safe and ultra-fast JSON codecs + circe booster
scodec/scodec - Scala combinator library for working with binary data
com-lihaoyi/upickle - uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala
sksamuel/avro4s - Avro schema generation and serialization / deserialization for Scala
tototoshi/scala-csv - CSV Reader/Writer for Scala
kaitai-io/kaitai_struct_compiler - Kaitai Struct: compiler to translate .ksy => .cpp / .cs / .dot / .go / .java / .js / .lua / .nim / .php / .pm / .py / .rb / .rs
twitter/chill - Scala extensions for the Kryo serialization library
hseeberger/akka-http-json - Integrate some of the best JSON libs in Scala with Akka HTTP (archived)
argonaut-io/argonaut - Purely functional JSON parser and library in scala.
nightscape/spark-excel - A Spark plugin for reading and writing Excel files
FasterXML/jackson-module-scala - Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes
typelevel/jawn - Jawn is for parsing jay-sawn (JSON)
zio/zio-json - Fast, secure JSON library with tight ZIO integration.
playframework/play-json - The Play JSON library
nrinaudo/kantan.csv - CSV handling library for Scala
eed3si9n/scalaxb - scalaxb is an XML data binding tool for Scala.
gnieh/diffson - A scala diff/patch library for Json
scala/scala-xml - The standard Scala XML library
mjakubowski84/parquet4s - Read and write Parquet in Scala. Use Scala classes as schema. No need to start a cluster.
codahale/jerkson - [ABANDONED] The Scala applewood bacon to Jackson's chicken breast: JSON cordon bleu. (archived)
jrudolph/json-lenses - A library to query and update JSON data in Scala.
sirthias/borer - Efficient CBOR and JSON (de)serialization in Scala
altoo-ag/akka-kryo-serialization - Kryo-based serialization for Akka
debasishg/sjson - Scala Json with capabilities for Scala Object Serialization
SandroGrzicic/ScalaBuff - the scala protocol buffers (protobuf) compiler
julianpeeters/avrohugger - Generate Scala case class definitions from Avro schemas
jto/validation - validation api extracted from play (archived)
stevej/scala-json - Scala JSON toolkit. Originally from the Odersky "Stairway" Book, tightened up and tests added by Twitter, Inc.
jvican/dijon - A Dynamically Typed Scala Json Library
norbert-radyk/spoiwo - Scala POI Wrapper for the spreadsheet generation in Excel:
spotify/magnolify - A collection of Magnolia add-on modules
folone/poi.scala - Scala library for creating and manipulating Excel documents
sentenza/PureCSV - A type-safe and boilerplate-free CSV library for Scala (archived)
djspiewak/anti-xml - The scala.xml library has some very annoying issues. Time for a clean-room replacement! (archived)
zio/zio-schema - Compositional, type-safe schema definitions, which enable auto-derivation of codecs and migrations.
gnieh/fs2-data - streaming data parsing and transformation library
zio/zio-blocks - Powerful, joyful building blocks for modern cloud-native applications.
andyglow/scala-jsonschema - Scala JSON Schema
circe/circe-derivation - Fast type class instance derivation for Circe
tethys-json/tethys - AST free JSON library for Scala
gzoller/ScalaJack - Fast JSON parser/generator for Scala
scala-jsonapi/scala-jsonapi - Scala support library for integrating the JSON API spec with Spray, Play! or Circe
nuttycom/xenomorph - Scala library for free applicative schemas capable of parsing/rendering sums-of-products data structures.
jcazevedo/moultingyaml - Scala wrapper for SnakeYAML
btlines/pbdirect - Read/Write Scala objects directly to Protobuf with no .proto file definitions

Caching and Queues

softwaremill/elasticmq - In-memory message queue with an Amazon SQS-compatible interface. Runs stand-alone or embedded.
akka/alpakka-kafka - Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
akka/alpakka - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.
cb372/scalacache - Simple caching in Scala
cakesolutions/scala-kafka-client - Scala helper modules for operating the Apache Kafka client library (0.9.x - 2.1.0)
softwaremill/kmq - Kafka-based message queue
elodina/scala-kafka - Quick up and running using Scala for Apache Kafka
typelevel/fs2-kafka - Functional Kafka for Scala
blemale/scaffeine - Thin Scala wrapper for Caffeine (https://github.com/ben-manes/caffeine)
CleverCloud/pulsar4s - Idiomatic, typesafe, and reactive Scala client for Apache Pulsar
SpinGo/op-rabbit - The Opinionated RabbitMQ Library for Scala and Akka
ShellRechargeSolutionsEU/akka-rabbitmq - RabbitMq client in Scala and Akka actors (archived)
lightbend/kafka-streams-scala - Thin Scala wrapper around Kafka Streams Java API (archived)
KarelCemus/play-redis - Play framework 2 cache plugin as an adapter to redis-server
sstone/amqp-client - [THIS PROJECT HAS BEEN ARCHIVED AND IS NO LONGER MAINTAINED] Simple fault-tolerant AMQP client written in Scala and based on Akka and the RabbitMQ java client (archived)
zio/zio-query - Add efficient pipelining, batching, and caching to any data source
mmolimar/kukulcan - A REPL for Apache Kafka
evolution-gaming/kafka-journal - Event sourcing journal implementation using Kafka as main storage
monix/shade - Memcached client for Scala

Search and Indexing

harana/search - Search everything, instantly.
plokhotnyuk/rtree2d - RTree2D is a 2D immutable R-tree for ultra-fast nearest and intersection queries in plane and spherical coordinates
meetuparchive/archery - 2D R-Tree implementation in Scala (archived)
inoio/solrs - An async, non-blocking solr client for java/scala, providing a query interface like SolrJ
gphat/wabisabi - Scala Asynchronous ElasticSearch HTTP Client (archived)
ornicar/scalex - [abandoned] Hoogle-like documentation search engine, for scala

Machine Learning and AI

Machine Learning Frameworks

apache/predictionio - PredictionIO, a machine learning server for developers and ML engineers. (archived)
microsoft/SynapseML - Simple and Distributed Machine Learning Python Library porting ML algorithms for Spark
metarank/metarank - A low code Machine Learning personalized ranking service for articles, listings, search results, recommendations that boosts user engagement. A friendly Learn-to-Rank engine
salesforce/TransmogrifAI - TransmogrifAI (pronounced trăns-mŏgˈrə-fī) is an AutoML library for building modular, reusable, strongly typed machine learning workflows on Apache Spark with minimal hand-tuning
combust/mleap - MLeap: Deploy ML Pipelines to Production
h2oai/sparkling-water - Sparkling Water provides H2O functionality inside Spark cluster
eaplatanios/tensorflow_scala - TensorFlow API for the Scala Programming Language
wzhe06/SparkCTR - CTR prediction model based on spark(LR, GBDT, DNN)
ThoughtWorksInc/DeepLearning.scala - A simple library for creating complex neural networks
factorie/factorie - FACTORIE is a toolkit for deployable probabilistic modeling, implemented as a software library in Scala. It provides its users with a succinct language for creating relational factor graphs, estimating parameters and performing inference.
spotify/featran - A Scala feature transformation library for data science and machine learning
stripe-archive/brushfire - Distributed decision tree ensemble learning in Scala (archived)
aws/sagemaker-spark - A Spark library for Amazon SageMaker.
linkedin/isolation-forest - A distributed Spark/Scala implementation of the isolation forest and extended isolation forest algorithms for unsupervised outlier detection, featuring support for scalable training and ONNX export for easy cross-platform inference.
ctongfei/nexus - Experimental tensor-typed deep learning
danielkorzekwa/bayes-scala - Bayesian Networks in Scala
tailhq/DynaML - Scala Library/REPL for Machine Learning Research
vinta/albedo - A recommender system for discovering GitHub repos, built with Apache Spark
linkedin/LiFT - The LinkedIn Fairness Toolkit (LiFT) is a Scala/Spark library that enables the measurement of fairness in large scale machine learning workflows.
rjagerman/glint - Glint: High performance scala parameter server
bytedeco/storch - GPU accelerated deep learning and numeric computing for Scala 3.
maxpumperla/ScalphaGoZero - An independent implementation of DeepMind's AlphaGoZero in Scala, using Deeplearning4J (DL4J)
EmergentOrder/onnx-scala - An ONNX (Open Neural Network eXchange) API and backend for typeful, functional deep learning and classical machine learning in Scala 3
botkop/scorch - scorch is a deep learning framework in Scala inspired by PyTorch
bytedeco/storch-recommend - pure pytorch recommend system on scala3
picnicml/doddle-model - :cake: doddle-model: machine learning in Scala.
mandubian/neurocat - From neural networks to the Category of composable supervised learning algorithms in Scala with compile-time matrix checking based on singleton-types
microsoft/scala_torch - Scala bindings for LibTorch (archived)
Clustering4Ever/Clustering4Ever - C4E, a JVM friendly library written in Scala for both local and distributed (Spark) Clustering.
ciren/cilib - Typesafe, purely functional Computational Intelligence
zenecture/neuroflow - Artificial Neural Networks for Scala
bobye/neuron - Scala library for neural networks
OndraFiedler/spark-recommender - Scalable recommendation system written in Scala using the Apache Spark framework

Data Science and Analytics

apache/spark - Apache Spark - A unified analytics engine for large-scale data processing
polynote/polynote - A better notebook for Scala (and more)
awslabs/deequ - Deequ is a library built on top of Apache Spark for defining "unit tests for data", which measure data quality in large datasets.
twitter/scalding - A Scala API for Cascading
spark-jobserver/spark-jobserver - REST job server for Apache Spark
spotify/scio - A Scala API for Apache Beam and Google Cloud Dataflow.
geekyouth/SZT-bigdata - 深圳地铁大数据客流分析系统🚇🚄🌟
apache/sedona - A cluster computing framework for processing large-scale geospatial data
almond-sh/almond - A Scala kernel for Jupyter
mesos/spark - Lightning-fast cluster computing in Java, Scala and Python.
typelevel/frameless - Expressive types for Spark.
gearpump/gearpump - Lightweight real-time big data streaming engine over Apache Pekko
vegas-viz/Vegas - The missing MatPlotLib for Scala + Spark
AbsaOSS/spline - Data Lineage Tracking And Visualization Solution
YotpoLtd/metorikku - A simplified, lightweight ETL Framework based on Apache Spark
Stratio/sparta - Real Time Analytics and Data Pipelines based on Spark Streaming (archived)
NICTA/scoobi - A Scala productivity framework for Hadoop.
spotify/ratatool - A tool for data sampling, data generation, and data diffing
mattpap/IScala - Scala backend for IPython
paypal/gimel - Big Data Processing Framework - Unified Data API or SQL on Any Storage
cibotech/evilplot - A Scala combinator-based plotting library.
G-Research/spark-extension - A library that provides useful extensions to Apache Spark and PySpark.
Azure/azure-event-hubs-spark - Enabling Continuous Data Processing with Apache Spark and Azure Event Hubs
Qbeast-io/qbeast-spark - Qbeast-spark: DataSource enabling multi-dimensional indexing and efficient data sampling. Big Data, free from the unnecessary!
alexarchambault/plotly-scala - Scala bindings for plotly.js
heathermiller/progfun-stats - Visualize statistics from the MOOC "Functional Programming Principles in Scala" using Scala!
asdud/Bigdata_project - 电商大数据项目-推荐系统(java和scala语言)
swoop-inc/spark-alchemy - Collection of open-source Spark tools & frameworks that have made the data engineering and data science teams at Swoop highly productive
SETL-Framework/setl - A simple Spark-powered ETL framework that just works 🍺
leobenkel/ZparkIO - Boiler plate framework to use Spark and ZIO together.
archivesunleashed/aut - The Archives Unleashed Toolkit is an open-source toolkit for analyzing web archives.
sparkling-graph/sparkling-graph - SparklingGraph provides easy to use set of features that will give you ability to proces large scala graphs using Spark and GraphX.
ElAlev/Wayeb - Wayeb is a Complex Event Processing and Forecasting (CEP/F) engine written in Scala.
coral-streaming/coral - Coral is a real-time analytics and data science platform. It transforms streaming events and extract patterns from data via RESTful APIs. Built on Scala, Akka, Cassandra and Spray. (archived)
51zero/eel-sdk - Big Data Toolkit for the JVM
scala-chart/scala-chart - Scala Chart Library
marklister/product-collections - A very simple, strongly typed, scala framework for tabular data. A collection of tuples. A strongly typed scala csv reader and writer. A lightweight idiomatic dataframe / datatable alternative.
VirtusLab/iskra - Typesafe wrapper for Apache Spark DataFrame API
bokeh/bokeh-scala - Scala bindings for Bokeh plotting library (archived)
yahoo/maha - A framework for rapid reporting API development; with out of the box support for high cardinality dimension lookups with druid.
twitter/tormenta - Scala extensions for Storm
smart-data-lake/smart-data-lake - Smart Automation Tool for building modern Data Lakes and Data Pipelines
MemVerge/splash - Splash, a flexible Spark shuffle manager that supports user-defined storage backends for shuffle data storage and exchange
xxxnell/flex - Probabilistic deep learning for data streams.
sameersingh/scalaplot - Library to plot graphs using a scala frontend, and various backends such as gnuplot, jfreegraph, matplotlib, etc.
chitralverma/scala-polars - Polars for Scala & Java projects!
flink-extended/flink-scala-api - Flink Scala API is a thin wrapper on top of Flink Java API which support Scala Types for serialisation as well the latest Scala version
holdenk/spark-validator - A library you can include in your Spark job to validate the counters and perform operations on success. Goal is scala/java/python support.

Networking and Distributed

Networking

playframework/play-mailer - Play mailer plugin
sirthias/scala-ssh - Remote shell access via SSH for your Scala applications
Comcast/ip4s - Defines immutable, safe data structures for describing IP addresses, multicast joins, socket addresses and similar IP & network related data types
dmurvihill/courier - send electronic mail with scala
ShellRechargeSolutionsEU/ocpp - Open Charge Point Protocol (archived)

RPC and Messaging

twitter/finagle - A fault tolerant, protocol-agnostic RPC system
twitter/scrooge - A Thrift parser/generator
akka/akka-grpc - A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
lihaoyi/autowire - Macros for simple/safe RPCs between Scala applications, including ScalaJS/ScalaJVM
higherkindness/mu-scala - Mu is a purely functional library for building RPC endpoint based services with support for RPC and HTTP/2
boundary/scalang - Scalang is a scala wrapper that makes it easy to write services that interface with erlang.
mDialog/scala-zeromq - Thread-safe ZeroMQ for Scala (archived)

Distributed Systems

ACINQ/eclair - A scala implementation of the Lightning Network.
wavesplatform/Waves - ⛓️ Reference Waves Blockchain Node (client) implementation on Scala
eligosource/eventsourced - A library for building reliable, scalable and distributed event-sourced applications in Scala
hyperledger-labs/Scorex - Scorex 2.0 Core (archived)
devsisters/shardcake - Sharding and location transparency for Scala
bitcoin-s/bitcoin-s - Bitcoin Implementation in Scala
ing-bank/baker - Orchestrate microservice-based process flows
fun-cqrs/fun-cqrs - Fun.CQRS is a Scala CQRS/ES framework. It provides the basic blocks to build event driven aggregates with Event Sourcing.
notxcain/aecor - Pure functional event sourcing runtime
khipu-io/khipu - An enterprise blockchain platform based on Ethereum
fthomas/crjdt - A conflict-free replicated JSON datatype (CRDT) in Scala
velvia/ScalaStorm - Harness the power and elegance of Scala with nathanmarz's Storm real-time system
input-output-hk/mantis - A Scala based client for Ethereum-like Blockchains.
VladKopanev/zio-saga - Purely Functional Transaction Management In Scala With ZIO (archived)
pablosmedina/ckite - CKite - A JVM implementation of the Raft distributed consensus algorithm written in Scala (archived)
alephium/alephium - Reference client for Alephium protocol
zio-archive/zio-keeper - A ZIO library for building distributed systems (archived)
svroonland/rezilience - ZIO-native utilities for making resilient distributed systems
zio-archive/zio-akka-cluster - ZIO wrapper for Akka Cluster (archived)
parapet-io/parapet - A purely functional library for building distributed and event-driven systems.
blockchain-unica/blockapi - A general framework for blockchain analytics
SwissBorg/lithium - Lithium - A split-brain resolver for Akka-Cluster (archived)
VladKopanev/cats-saga - Purely Functional Transaction Management In Scala With Cats (archived)
iheartradio/kanaloa - Make your service more resilient by providing protection against traffic oversaturation
ACINQ/bitcoin-lib - Simple bitcoin library written in Scala
openlawteam/openlaw-core - Shared Scala libraries for the OpenLaw project. (archived)
PaytmLabs/akka-batteries - Utilities for Akka cluster in production

Cloud and Infrastructure

seratch/AWScala - Using AWS SDK on the Scala REPL (archived)
getnelson/nelson - Automated, multi-region container deployment
doriordan/skuber - A Scala Kubernetes client library
Bayer-Group/cloudformation-template-generator - A type-safe Scala DSL for generating CloudFormation templates
Tapad/sbt-docker-compose - Integrates Docker Compose functionality into sbt (archived as unmaintained) (archived)
VirtusLab/besom - Besom - a Pulumi SDK for Scala. Also, incidentally, a broom made of twigs tied round a stick. Brooms and besoms are used for protection, to ward off evil spirits, and cleansing of ritual spaces.
sbt-jib/sbt-jib - sbt version of sbt jib: https://github.com/GoogleContainerTools/jib
zio/zio-aws - Low level ZIO interface for the full AWS
mkotsur/aws-lambda-scala - Writing AWS Lambdas in Scala
joan38/kubernetes-client - A Kubernetes client for Scala
dwhjames/aws-wrap - Asynchronous Scala Clients for Amazon Web Services
alexkvak/teamcity-slack - TeamCity Slack plugin
heroku/heroku-sbt-plugin - An sbt plugin for deploying Heroku Scala applications (archived)
quaich-project/quaich - Scala Serverless Microframework for AWS Lambda, inspired by Amazon's Chalice (https://github.com/awslabs/chalice)
Orkestra-Tech/orkestra - Functional DevOps with Scala and Kubernetes

Monitoring and Observability

kamon-io/Kamon - Distributed Tracing, Metrics and Context Propagation for applications running on the JVM
twitter-archive/ostrich - A stats collector & reporter for Scala servers (deprecated) (archived)
erikvanoosten/metrics-scala - The scala API for Dropwizard's Metrics.
typelevel/natchez - functional tracing for cats
typelevel/otel4s - An OpenTelemetry library for Scala based on Cats-Effect
zalando-incubator/remora - Kafka consumer lag-checking application for monitoring, written in Scala and Akka HTTP; a wrap around the Kafka consumer group command. Integrations with Cloudwatch and Datadog. Authentication recently added
trace4cats/trace4cats - Distributed app tracing implementation in pure scala using cats-effect
kubukoz/sup - Composable, purely functional healthchecks in Scala. (archived)
zio/zio-telemetry - ZIO-powered OpenTelemetry library
Colisweb/scala-opentracing - A tracing library for Cats and Http4s, tailored for Opentracing tracers like Datadog and Jaeger (archived)

User Interface

Terminal and Console UI

marconilanna/REPLesent - A neat little tool to build presentations using the Scala REPL
mattlianje/layoutz - Simple, beautiful CLI output
oyvindberg/jatatui - A Java port of ratatui — build rich terminal UIs from Java
Tenchi2xh/Scurses - Scurses, terminal drawing API for Scala, and Onions, a Scurses framework for easy terminal UI
com-lihaoyi/fansi - Scala/Scala.js library for manipulating Fancy Ansi colored strings

Applications and End User Tools

lichess-org/lila - ♞ lichess.org: the forever free, adless and open source chess server ♞
yahoo/CMAK - CMAK is a tool for managing Apache Kafka clusters
gitbucket/gitbucket - A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility
xxf098/shadowsocksr-v2ray-trojan-android - A simple client for Android
PkmX/lcamera - A camera app using the new camera2 API in Android Lollipop (archived)
Antox/Antox - Android client for Project Tox - Secure Peer to Peer Messaging (archived)
TouK/nussknacker - Low-code tool for automating actions on real time data | Stream processing for the users.
felixgborrego/simple-docker-ui - Native Docker UI implemented using Scala.js and React - DEPRECATED
markwinter/Antox - Scala android client for Project Tox - secure p2p messaging
scalacenter/scastie - An interactive playground for Scala
scalad/LayIM - 基于HTML5 WebSocket的一款IM即时通讯软件，使用Gradle集成了Scala、SpringBoot、Spring MVC、Mybatis、Redis等，前端使用了LayIm框架
MAIF/izanami - Izanami is a centralized versatile feature flag solution, well suited for micro service architectures.
hrj/abandon - :relieved: Simple and Robust Accounting
atware/scuruto - An internal knowledge sharing app
sndnv/stasis - Multiplatform backup and recovery system with emphasis on security and privacy
Nutomic/ensichat - Decentralized instant messenger for Android, with end-to-end encryption (archived)
xebia-functional/scala-days-android - Official Android app for Scala Days
yoshikyoto/lgtmoon - LGTM画像を簡単に作成できるアプリ
reibitto/command-center - A CLI-based launcher and general productivity tool.
MasseGuillaume/ScalaKata2 - Interactive Playground (archived)

Graphics and Media

Game Development

MightyPirates/OpenComputers - Home of the OpenComputers mod for Minecraft. (archived)
lichess-org/scalachess - Chess API written in scala. Immutable and free of side effects.
PurpleKingdomGames/indigo - An FP game engine for Scala. (archived)
scalatron/scalatron - Scalatron, a multi-player programming game in which coders pit bot programs (written in Scala) against each other
nivanov/cosplay - 🕹 2D ASCII Game Engine for Scala3
delorum/scage - game engine written in Scala
regb/scala-game-library - Scala library for cross-platform game development
abbruzze/kernal64 - A Scala Commodore 64, 128, VIC20, CBM2 and SuperCPU emulator

Security

Security Tools

TheHive-Project/TheHive - TheHive is a Cybersecurity Incident Response Management (CIRM) platform, now distributed commercially. Learn more on the official website: (archived)
joernio/joern - Open-source code analysis platform for C/C++/Java/Binary/Javascript/Python/Kotlin based on code property graphs. Discord https://discord.gg/vv4MH284Hc
TheHive-Project/Cortex - Cortex: a Powerful Observable Analysis and Active Response Engine
makenowjust-labs/recheck - The trustworthy ReDoS checker
albuch/sbt-dependency-check - SBT Plugin for OWASP DependencyCheck. Monitor your dependencies and report if there are any publicly known vulnerabilities (e.g. CVEs). :rainbow: (archived)
sief/play-guard - Play2 module for rate limiting, based on token bucket algorithm

Authentication and Authorization

mohiva/play-silhouette - Silhouette is an authentication library for Play Framework applications that supports several authentication methods, including OAuth1, OAuth2, OpenID, CAS, 2FA, TOTP, Credentials, Basic Authentication or custom authentication schemes. (archived)
jwt-scala/jwt-scala - JWT support for Scala. Bonus extensions for Play, Play JSON, Json4s, Circe, uPickle, Spray and Argonaut
nulab/scala-oauth2-provider - OAuth 2.0 server-side implementation written in Scala
softwaremill/akka-http-session - Web & mobile client-side akka-http sessions, with optional JWT support (archived)
jasongoodwin/authentikat-jwt - JWT Scala Implementation - Claims based auth for Scala.

Concurrency and Performance

Concurrency and Parallelism

zio/zio - ZIO — A type-safe, composable library for async and concurrent programming in Scala
typelevel/fs2 - Compositional, streaming I/O library for Scala
typelevel/cats-effect - The pure asynchronous runtime for Scala
monix/monix - Asynchronous, Reactive Programming for Scala and Scala.js.
apache/pekko - Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala
scala/scala-async - An asynchronous programming facility for Scala
lihaoyi/scala.rx - An experimental library for Functional Reactive Programming in Scala
ReactiveX/RxScala - RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences
getkyo/kyo - Toolkit for Scala Development
softwaremill/ox - Safe direct-style streaming, concurrency and resiliency for Scala on the JVM
akka-js/akka.js - Akka, for Scala.js
lampepfl/gears - A strawman for a low-level async library in Scala 3.
krasserm/streamz - A combinator library for integrating Functional Streams for Scala (FS2), Akka Streams and Apache Camel
zio-archive/zio-actors - A high-performance, purely-functional library for building, composing, and supervising typed actors based on ZIO (archived)
nbronson/scala-stm - A library-based Software Transactional Memory (STM) for Scala, coupled with transactional sets and maps
traneio/arrows - High-performance Arrow and Task in Scala
scala/scala-parallel-collections - Parallel collections standard library module for Scala 2.13+
TomasMikula/libretto - Declarative concurrency and stream processing library for Scala
runarorama/scala-machines - A stream processing library for Scala
rssh/scala-gopher - Implementation of CSP constructions (Communication Sequence Process, i.e. go-like channels) in scala
dotty-cps-async/dotty-cps-async - experimental CPS transformer for dotty
SystemFw/upperbound - A purely functional rate limiter
travisbrown/iteratee - Iteratees for Cats
axel22/Ctries - Scala implementation of the Ctrie datastructure.
qifun/stateless-future - Asynchronous programming in fully featured Scala syntax.
scala-blitz/scala-blitz - Scala framework for efficient sequential and data-parallel collections -
sirthias/swave - A lightweight Reactive Streams Infrastructure Toolkit for Scala.
storm-enroute/coroutines - Scala coroutines implementation.
Chymyst/chymyst-core - Declarative concurrency in Scala - The implementation of the chemical machine
zio/zio-direct - Direct-Style Programming for ZIO
com-lihaoyi/castor - Castor is a lightweight, typed Actor library for Scala and Scala.js
TimWSpence/cats-stm - A STM implementation for Cats Effect
johanandren/futiles - The missing utils for working with Scala Futures
ingoem/scala-react - Scala.react is a reactive programming library for Scala.
sjrd/scala-js-actors - Actor system for Scala.js (archived)

Performance and Optimization

sbt/sbt-jmh - "Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness)
densh/scala-offheap - Experimental type-safe off-heap memory for Scala. (archived)
scalameter/scalameter - Microbenchmarking and performance regression testing framework for the JVM platform.
xerial/larray - Large off-heap arrays and mmap files for Scala and Java
nativelibs4java/ScalaCL - ScalaCL - run Scala on your GPU!
ComputeNode/cyfra - Multi-platform GPGPU computations with Scala, seamlessly 🚀
Ichoran/thyme - Thyme is a microbenchmark utility for Scala. It includes Parsley, a (simple) local profiling tool. (archived)
plokhotnyuk/actors - Evaluation of API and performance of different actor libraries
johnynek/inliner - scala macros to inline idiomatic scala for maximum performance
sirthias/scala-benchmarking-template - SBT template project for creating Scala (micro-)benchmarks based on Caliper

Testing and Quality

Testing

gatling/gatling - Modern Load Testing as Code
typelevel/scalacheck - Property-based testing for Scala
seveniruby/AppCrawler - 基于appium的app自动遍历工具
scalatest/scalatest - A testing tool for Scala and Java developers
etorreborre/specs2 - Software Specifications for Scala
testcontainers/testcontainers-scala - Docker containers for testing in scala
scalamock/scalamock - Native Scala mocking framework
com-lihaoyi/utest - A simple testing framework for Scala
scalameta/munit - Scala testing library with actionable errors and extensible APIs
scoverage/scalac-scoverage-plugin - Scoverage Scala Code Coverage Core Libs
whisklabs/docker-it-scala - Docker integration testing kit with Scala
mockito/mockito-scala - Mockito for Scala language
softwaremill/diffx - Pretty diffs for scala case classes (archived)
typelevel/discipline - Flexible law checking for Scala
manub/scalatest-embedded-kafka - A library that provides an in-memory Kafka instance to run your tests against.
scalaprops/scalaprops - property based testing library for Scala
hedgehogqa/scala-hedgehog - Release with confidence, state-of-the-art property testing for Scala.
alexarchambault/scalacheck-shapeless - Generation of arbitrary case classes / ADTs instances with scalacheck and shapeless
agourlay/cornichon - Testing tool in Scala for HTTP JSON API
stryker-mutator/stryker4s - Mutation testing for Scala
typelevel/cats-effect-testing - Integration between cats-effect and test frameworks
japgolly/nyaya - Random Data Generation and/or Property Testing in Scala & Scala.JS.
pniederw/expecty - Power assertions (as known from Groovy and Spock) for the Scala language.
DanielaSfregola/random-data-generator - Random generator of test data in Scala based on Scalacheck and Shapeless
sbt-doctest/sbt-doctest - Doctest for scala
jpzk/mockedstreams - Scala DSL for Unit-Testing Processing Topologies in Kafka Streams
monix/minitest - The super light testing library for Scala and Scala.js
bizzabo/diff - Visually compare Scala data structures with out of the box support for arbitrary case classes.
chiselverify/chiselverify - A dynamic verification library for Chisel.
youzan/gatling-dubbo - A gatling plugin for running load tests on Apache Dubbo(https://github.com/apache/incubator-dubbo) and other java ecosystem.
japgolly/test-state - Scala Test-State.
leanovate/play-mockws - Mock WS client for Play Framework
scala/community-build - Scala 2 community build — a corpus of open-source repos built against Scala nightlies
mtkopone/scct - Scala Code Coverage Tool
sbt/sbt-jacoco - an sbt plugin for JaCoCo Code Coverage
47degrees/scalacheck-toolbox - A helping hand for generating sensible data with ScalaCheck
ITV/scala-pact - A Scala implementation of CDC using the Pact standard (archived)
playframework/scalatestplus-play - ScalaTest + Play
mgonto/factory_pal - A Scala framework for creating objects as test data. Say no to Mocks
scoverage/sbt-coveralls - sbt-plugin to upload sbt-scoverage reports to coveralls
ca-archived/aeromock - Lightweight mock web application server
CyberAgent/aeromock - Lightweight mock web application server

Utilities

Command Line Tools

rtyley/bfg-repo-cleaner - Removes large or troublesome blobs like git-filter-branch does, but faster. And written in Scala
foundweekends/giter8 - a command line tool to apply templates defined on GitHub
scallop/scallop - a simple Scala CLI parsing library
bkirwi/decline - A composable command-line parser for Scala.
alexarchambault/case-app - Type-level & seamless command-line argument parsing for Scala
com-lihaoyi/mainargs - A small, convenient, dependency-free library for command-line argument parsing in Scala
scala-garden/jardiff - A tool for comparing JAR files, including method bodies and Scala 2 pickled signatures
zio/zio-cli - Rapidly build powerful command-line applications powered by ZIO
backuity/clist - Command Line Interface Scala Toolkit

Logging and Configuration

pureconfig/pureconfig - A boilerplate-free library for loading configuration files
scala-garden/scala-logging - Convenient and performant logging library for Scala wrapping SLF4J.
outr/scribe - The fastest logging library in the world. Built from scratch in Scala and programmatically configurable.
LEGO/woof - A pure Scala 3 logging library with no reflection
vlovgr/ciris - Functional Configurations for Scala
valskalla/odin - Fast & Functional logger in Scala
zio/zio-config - Easily use and document any config from anywhere in ZIO apps
Philippus/sbt-dotenv - ⏺️ Dotenv implementation for Scala sbt builds. Configures environment for local development.
zio/zio-logging - Powerful logging for ZIO 2.0 applications, with compatibility with many logging backends out-of-the-box.
Verizon/knobs - A reasonable configuration library for Scala (archived)
ceedubs/ficus - Scala-friendly companion to Typesafe config - moved to https://github.com/iheartradio/ficus (archived)
typesafehub/scalalogging - Convenient and performant logging in Scala
Log4s/log4s - High-performance SLF4J wrapper for Scala.
kxbmap/configs - Scala wrapper for Typesafe config
japgolly/clear-config - Scala FP configuration library with a focus on runtime clarity
ekrich/sconfig - Scala configuration library supporting HOCON for Scala, Java, Scala.js, and Scala Native
paradigmatic/Configrity - Simple, immutable and flexible configuration library for scala.
circe/circe-config - Yet another Typesafe config Scala wrapper powered by circe
carueda/tscfg - Schema-first, boilerplate-free, type-safe access to configuration properties in Java and Scala
hanabix/config-annotation - A refactor-friendly way to use typesafe's config by scala macro annotation (archived)

Text Processing

com-lihaoyi/fastparse - Writing Fast Parsers Fast in Scala
com-lihaoyi/scalatags - ScalaTags is a small XML/HTML construction library for Scala.
sirthias/parboiled2 - A macro-based PEG parser generator for Scala 2.10+
scala/scala-parser-combinators - simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module
scalate/scalate - Scalate is a Scala based template engine which supports HAML, Mustache and JSP, Erb and Velocity style syntaxes.
tpolecat/tut - doc/tutorial generator for scala (archived)
playframework/twirl - Twirl is Play's default template engine
rockymadden/stringmetric - :dart: String metrics and phonetic algorithms for Scala (e.g. Dice/Sorensen, Hamming, Jaccard, Jaro, Jaro-Winkler, Levenshtein, Metaphone, N-Gram, NYSIIS, Overlap, Ratcliff/Obershelp, Refined NYSIIS, Refined Soundex, Soundex, Weighted Levenshtein). (archived)
typelevel/Laika - Site and E-book Generator and Customizable Text Markup Transformer for sbt, Scala and Scala.js
Eliah-Lakhin/papa-carlo - Constructor of incremental parsers in Scala
scalameta/mdoc - Typechecked markdown documentation for Scala
tpolecat/atto - friendly little parsers
lihaoyi/Scalatex - Programmable, Typesafe Document Generation
com-lihaoyi/PPrint - Pretty-printing value, types and type-signatures in Scala
j-mie6/parsley - A fast and modern parser combinator library for Scala
spray/twirl - The Play framework Scala template engine, stand-alone and packaged as an SBT plugin
cloudify/sPDF - Create PDFs from Scala using plain old HTML and CSS. Uses wkhtmltopdf on the back-end which renders HTML using Webkit.
djspiewak/parseback - A Scala implementation of parsing with derivatives
typelevel/paiges - an implementation of Wadler's a prettier printer
foundweekends/pamflet - a publishing application for short texts
zalando/beard - A lightweight, logicless templating engine, written in Scala and inspired by Mustache (archived)
sake92/hepek - Typesafe HTML templates and static site generator in pure Scala
mwunsch/handlebars.scala - A Scala implementation of the Handlebars templating language (a superset of Mustache).
chenkelmann/actuarius - A markdown processor for the JVM written in Scala.
sparsetech/pine - Functional HTML5 and XML library for the Scala platform
ua-parser/uap-scala - Scala port of ua-parser
tristanjuricek/knockoff - A Markdown parser + object model in scala
propensive/contextual - Statically-checked string interpolation in Scala
propensive/kaleidoscope - Statically-checked inline matching on regular expressions in Scala

Files and Operating System

pathikrit/better-files - Simple, safe and intuitive Scala I/O
com-lihaoyi/os-lib - OS-Lib is a simple, flexible, high-performance Scala interface to common OS filesystem and subprocess APIs
zio-archive/zio-nio - A small, unopinionated ZIO interface to NIO. (archived)
scalajs-io/nodejs - This project provides Scala.js type-safe bindings for Node.js (current) v8.7.0 and LTS v6.11.4 APIs. The platform supports MEAN (MongoDB, Express, AngularJs, NodeJS), Cassandra, MySQL and many other npm projects.
jesseeichar/scala-io - Repository for work on Scala Standard Library I/O components
jodersky/akka-serial - Reactive serial communication library for Akka and Scala.
lloydmeta/schwatcher - File-watching library for Scala. Built on Java 7's WatchService, RxScala and Akka actors. (archived)
HouzuoGuo/schale - A subprocess interface for Scala
vigoo/prox - A Scala library for working with system processes

Date and Time

nscala-time/nscala-time - A new Scala wrapper for Joda Time based on scala-time
jorgeortiz85/scala-time - A Scala wrapper for Joda Time
PagerDuty/scheduler - A Scala library for scheduling arbitrary code to run at an arbitrary time. (archived)
fthomas/fs2-cron - FS2 streams based on cron expressions
alonsodomin/cron4s - Cross-platform CRON expression parsing for Scala
maxcellent/lamma - Lamma schedule generator for Scala is a professional schedule generation library for periodic schedules like fixed income coupon payment, equity deravitive fixing date generation etc.
scala-js/scala-js-java-time - Scala.js implementation for java.time in JDK8

Automation and Scripting

bot4s/telegram - Telegram Bot API Wrapper for Scala
augustjune/canoe - Functional Telegram Bot API for Scala
business4s/workflows4s - Simple, Composable, Business-oriented Workflows for Scala
Katrix/AckCord - A Discord library for Scala using Akka
criteo/cuttle - An embedded job scheduler.

General Purpose Libraries

scalaz/scalaz - Principled Functional Programming in Scala
milessabin/shapeless - Generic programming for Scala
twitter/util - Wonderful reusable code from Twitter
fthomas/refined - Refinement types for Scala
optics-dev/Monocle - Optics library for Scala
softwaremill/macwire - Zero-cost, compile-time, type-safe dependency injection library.
scalalandio/chimney - Scala library for boilerplate-free, type-safe data transformations
lloydmeta/enumeratum - A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.
typelevel/simulacrum - First class syntax support for type classes in Scala
softwaremill/quicklens - Modify deeply nested case class fields
precog/matryoshka - Generalized recursion schemes and traversals for Scala.
softwaremill/magnolia - Easy, fast, transparent generic derivation of typeclass instances
wvlet/airframe - Essential Building Blocks for Scala
7mind/izumi - Productivity-oriented collection of lightweight fancy stuff for Scala toolchain
frees-io/freestyle - A cohesive & pragmatic framework of FP centric Scala libraries
atnos-org/eff - Eff monad for cats - https://atnos-org.github.io/eff
scala-graph/scala-graph - Graph for Scala is intended to provide basic graph functionality seamlessly fitting into the Scala Collection Library. Like the well known members of scala.collection, Graph for Scala is an in-memory graph library aiming at editing and traversing graphs, finding cycles etc. in a user-friendly way.
scalapy/scalapy - Use the world of Python from the comfort of Scala!
typelevel/cats-collections - Data structures for pure functional programming in Scala
Iltotore/iron - Strong type constraints for Scala
com-lihaoyi/sourcecode - Scala library providing "source" metadata to your program, similar to Python's name, C++'s LINE or Ruby's FILE.
jsuereth/scala-arm - This project aims to be the Scala Incubator project for Automatic-Resource-Management in the scala library
estatico/scala-newtype - NewTypes for Scala with no runtime overhead
wix-incubator/accord - Accord: A sane validation library for Scala
xebia-functional/fetch - Simple & Efficient data access for Scala and Scala.js
zio/zio-prelude - A lightweight, distinctly Scala take on functional abstractions, with tight ZIO integration
arainko/ducktape - Automatic and customizable compile time transformations between similar case classes and sealed traits/enums, essentially a thing that glues your code. Scala 3 only. Or is it duct 🤔
scala/scala-java8-compat - A Java 8 (and up) compatibility kit for Scala.
higherkindness/droste - recursion schemes for cats; to iterate is human, to recurse, divine
dickwall/subcut - Scala Uniquely Bound Classes Under Traits
alexandrnikitin/bloom-filter-scala - Bloom filter for Scala, the fastest for JVM
typelevel/mouse - A small companion to cats
softwaremill/retry - because you should never give up, at least not on the first try
typelevel/cats-tagless - Library of utilities for tagless final encoded algebras
scala-hamsters/hamsters - A mini Scala utility library
scaldi/scaldi - Lightweight Scala Dependency Injection Library
monadless/monadless - Syntactic sugar for monad composition in Scala
non/debox - Fast, deboxed, specialized data structures for Scala
kailuowang/henkan - A small library for converting between case classes.
kitlangton/neotype - A friendly newtype library for Scala 3
ThoughtWorksInc/Dsl.scala - A framework to create embedded Domain-Specific Languages in Scala
ThoughtWorksInc/each - A macro library that converts native imperative syntax to scalaz's monadic expressions
zalando/grafter - Grafter is a library to configure and wire Scala applications (archived)
chrisokasaki/scads - Scala Algorithms and Data Structures
scala/scala-collection-compat - makes some Scala 2.13 APIs (primarily collections, also some others) available on 2.11 and 2.12, to aid cross-building
typelevel/shapeless-3 - Generic programming for Scala
Verizon/quiver - A reasonable library for modeling multi-graphs in Scala (archived)
avast/scala-server-toolkit - Functional programming toolkit for building server applications in Scala. (archived)
scala/collection-strawman - Implementation of the new Scala 2.13 Collections (archived)
kenbot/goggles - Pleasant, yet principled Scala optics DSL
mpilquist/Structures - Functional type classes for Scala (archived)
aztek/scala-workflow - Boilerplate-free syntax for computations with effects
frees-io/iota - Fast [co]product types with a clean syntax. For Cats & Scalaz.
pelotom/effectful - A syntax for type-safe effectful computations in Scala
fwbrasil/bond - Type-level validation for Scala
oleg-py/meow-mtl - Next Level MTL for Scala
pathikrit/sauron - Yet another Scala lens macro
kubuszok/hearth - The first Scala macros' standard library
fthomas/singleton-ops - Operations for primitive and String singleton types (archived)
scala-records/scala-records - Labeled records for Scala based on structural refinement types and macros.
theiterators/kebs - Scala library to eliminate boilerplate
zio/izumi-reflect - TypeTag without scala-reflect. Supports Scala 2 and Scala 3.
dwickern/scala-nameof - Get the name of an variable, function, class member, or type as a string--at compile-time!
krzemin/octopus - Scala library for boilerplate-free validation
stripe/dagon - Tools for rewriting and optimizing DAGs (directed-acyclic graphs) in Scala
davenverse/fuuid - Functional UUID's for Scala
b-studios/scala-effekt - Extensible algebraic effects with handlers
yaes-io/yaes - A direct-style effect system in Scala 3 that tracks effects using context parameters
heathermiller/spores - Scala Spores, safe mobile closures.
softwaremill/scala-common - Tiny independent libraries with a single purpose, often a single class (archived)
typelevel/spotted-leopards - Proof of concept for a cats-like library built using Dotty features
propensive/soundness - A platform of libraries for Scala 3
scala-interop/slinc - Scala <-> C interop
lloydmeta/diesel - Boilerplate-free, zero-overhead Tagless Final / typed-final / Finally Tagless DSLs in Scala
Thangiee/Freasy-Monad - Easy way to create Free Monad using Scala macros with first-class Intellij support.
scala/scala-collection-contrib - community-contributed additions to the Scala 2.13 collections
scala-tsi/scala-tsi - Generate typescript interfaces from your scala classes
sisioh/scala-dddbase - Scala Library for Domain Driven-Design (archived)
rudogma/scala-supertagged - Unboxed (multi-nested-)tagged + unboxed newtypes. Better and much friendlier alternative to AnyVals.
rklaehn/radixtree - A fast and generic immutable radix tree for scala
denisrosset/metal - Metal - fast unboxed data structures for Scala
bfil/scala-automapper - Hassle-free case class mapping!
bmc/classutil - Scala-friendly, fast class-finder library (using ASM under the covers)
kailuowang/mainecoon - Transform and compose tagless final encoded algebras in scala (archived)
akisaarinen/rillit - Boilerplate-free Functional Lenses for Scala 2.10
vivri/Adjective - Programming is an exercise in linguistics; spice-up Scala types with Adjective.
w11k/scalamodules - ScalaModules is an elegant and intuitive domain specific language for OSGi development written in the Scala programming language. (archived)
bmc/grizzled-scala - A general-purpose library of miscellaneous stuff for Scala.
rklaehn/abc - Array-based immutable collections for scala

Science and Math

Mathematics

scalanlp/breeze - Breeze is/was a numerical processing library for Scala.
twitter/algebird - Abstract Algebra for Scala
typelevel/spire - Powerful new number types and numeric abstractions for Scala.
typelevel/squants - The Scala API for Quantities, Units of Measure and Dimensional Analysis
stripe/rainier - Bayesian inference in Scala.
typelevel/algebra - Experimental project to lay out basic algebra type classes (archived)
scalala/Scalala - Scalala has been superseded by dlwh/breeze. Scalala is a high performance numeric linear algebra library for Scala, with rich Matlab-like operators on vectors and matrices; a library of numerical routines; support for plotting.
erikerlandson/coulomb - coulomb: unit analysis for Scala
vagmcs/Optimus - Optimus is a mathematical programming library for Scala.
neysofu/tyche - Statistics utilities for the JVM - in Scala!
runarorama/Malakov - Markov Chains for Scala

Scientific Computing

chipsalliance/rocket-chip - Rocket Chip Generator
riscv-boom/riscv-boom - SonicBOOM: The Berkeley Out-of-Order Machine
broadinstitute/cromwell - Scientific workflow engine designed for simplicity & scalability. Trivially transition between one off use cases to massive scale production environments
bigdatagenomics/adam - ADAM is a genomics analysis platform with specialized file formats built using Apache Avro, Apache Spark, and Apache Parquet. Apache 2 licensed.
tensil-ai/tensil - Open source machine learning accelerators (archived)
fulcrumgenomics/fgbio - Tools for working with genomic and high throughput sequencing data.
ThoughtWorksInc/Compute.scala - Scientific computing with N-dimensional arrays
ucsc-vama/essent - high-performance RTL simulator
eryk/squant - SQuant是使用scala语言编写的量化开发工具箱，提供开箱即用的A股股票数据和外汇数据（docker镜像），以及高效的回测框架与交易模块。方便Java/Scala爱好者进行量化投资研究。 QQ群：281599099，微信公众号：Python量化交易实战。对，我已经转python了。。。
openmole/openmole - Workflow engine for exploration of simulation models using high throughput computing
sterglee/scalalab - ScalaLab: Efficient MATLAB like scientific computing for the Java platform with the current Scala 2.13. For Scala 3 the equivalent project is dottylab: https://github.com/sterglee/dottylab
bioscala/bioscala - Bioinformatics for the Scala programming language

Formal Methods and Proofs

epfl-lara/stainless - Verification framework and tool for higher-order Scala programs. https://gitlab.epfl.ch/lara/stainless
Chymyst/curryhoward - Automatic code generation for Scala functions and expressions via the Curry-Howard isomorphism
TyGuS/suslik - Synthesis of Heap-Manipulating Programs from Separation Logic
epfl-lara/ScalaZ3 - DSL in Scala for Constraint Solving with Z3 SMT Solver
gapt/gapt - GAPT: General Architecture for Proof Theory

Other

twitter/the-algorithm - Source code for the X Recommendation Algorithm
prisma/prisma1 - 💾 Database Tools incl. ORM, Migrations and Admin UI (Postgres, MySQL & MongoDB) [deprecated] (archived)
akka/akka-core - A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.
lk-geimfari/awesomo - Cool open source projects. Choose your project and get involved in Open Source development now.
delta-io/delta - An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs
twitter-archive/snowflake - Snowflake is a network service for generating unique ID numbers at high scale with some simple guarantees. (archived)
OpenXiangShan/XiangShan - Open-source high-performance RISC-V processor
snowplow/snowplow - The leader in Customer Data Infrastructure
lhartikk/ArnoldC - Arnold Schwarzenegger based programming language
apache/openwhisk - Apache OpenWhisk is an open source serverless cloud platform
guardian/frontend - The Guardian DotCom.
typelevel/cats - Lightweight, modular, and extensible library for functional programming.
linkerd/linkerd - Old repo for Linkerd 1.x. See the linkerd2 repo for Linkerd 2.x.
airbnb/aerosolve - A machine learning package built for humans.
mesos/chronos - Fault tolerant job scheduler for Mesos which handles dependencies and ISO8601 based schedules
JohnSnowLabs/spark-nlp - State of the Art Natural Language Processing
d2iq-archive/marathon - Deploy and manage containers (including Docker) on top of Apache Mesos at scale. (archived)
twitter-archive/diffy - Find potential bugs in your services with Diffy (archived)
Netflix/atlas - In-memory dimensional time series database.
lw-lin/CoolplaySpark - 酷玩 Spark: Spark 源代码解析、Spark 类库等
twitter-archive/flockdb - A distributed, fault-tolerant graph database (archived)
databricks/Spark-The-Definitive-Guide - Spark: The Definitive Guide's Code Repository
twitter-archive/kestrel - simple, distributed message queue system (inactive) (archived)
aditya-grover/node2vec
ucb-bar/chipyard - An Agile RISC-V SoC Design Framework with in-order cores, out-of-order cores, accelerators, and more
NotProtonNot/NotProton - Steam Play for macOS
apache/kyuubi - Apache Kyuubi is a distributed and multi-tenant gateway to provide serverless SQL on data warehouses and lakehouses.
twitter-archive/gizzard - [Archived] A flexible sharding framework for creating eventually-consistent distributed datastores (archived)
laurilehmijoki/s3_website - Manage an S3 website: sync, deliver via CloudFront, benefit from advanced S3 website features.
twitter/summingbird - Streaming MapReduce with Scalding and Storm (archived)
pocorall/scaloid - Scaloid makes your Android code easy to understand and maintain.
ValeLang/Vale - Compiler for the Vale programming language - http://vale.dev/
MojoJolo/textteaser - TextTeaser is an automatic summarization algorithm.
feathr-ai/feathr - Feathr – A scalable, unified data and AI engineering platform for enterprise
byzer-org/byzer-lang - Byzer (former MLSQL): A low-code open-source programming language for data pipeline, analytics and AI.
Graphcool/graphcool-framework - (archived)
OpenBankProject/OBP-API - An open source RESTful API platform for banks that supports Open Banking, XS2A, PSD2 and Open Finance through access to accounts, transactions, counterparties, payments, entitlements and metadata - plus a host of internal banking and management APIs.
apache/gluten - Gluten is a middle layer responsible for offloading JVM-based SQL engines' execution to native engines.
twitter/twitter-server - Twitter-Server defines a template from which services at Twitter are built
OSCPU/NutShell - RISC-V SoC designed by students in UCAS
holdenk/spark-testing-base - Base classes to use when writing tests with Spark
ucb-bar/gemmini - Berkeley's Spatial Array Generator
sryza/aas - Code to accompany Advanced Analytics with Spark from O'Reilly Media
GravityLabs/goose - Html Content / Article Extractor in Scala - open sourced from Gravity Labs (archived)
smallnest/C1000K-Servers - :zap: High performance websocket servers implemented by Spray-can, Netty, undertow, jetty, Vert.x, Grizzly, node.js and Go. It supports 1,200,000 active websocket connections (archived)
locationtech/geomesa - GeoMesa is a suite of tools for working with big geo-spatial data in a distributed fashion.
guardian/grid - The Guardian’s image management system
paypal/squbs - Akka Streams & Akka HTTP for Large-Scale Production Deployments
databricks/LearningSparkV2 - This is the github repo for Learning Spark: Lightning-Fast Data Analytics [2nd Edition]
locationtech/geotrellis - GeoTrellis is a geographic data processing engine for high performance applications.
tensorflow/ecosystem - Integration of TensorFlow with other open-source frameworks (archived)
akka/akka-http - The Streaming-first HTTP server/module of Akka
twitter-archive/iago - A load generator, built for engineers (archived)
apache/datafusion-comet - Apache DataFusion Comet Spark Accelerator
rikvdkleij/intellij-haskell - IntelliJ plugin for Haskell (archived)
graphframes/graphframes - GraphFrames is a package for Apache Spark which provides DataFrame-based Graphs
sryza/spark-timeseries - A library for time series analysis on Apache Spark
NetLogo/NetLogo - turtles, patches, and links for kids, teachers, and scientists
jaliss/securesocial - A module that provides OAuth, OAuth2 and OpenID authentication for Play Framework applications
twosigma/flint - A Time Series Library for Apache Spark
killrweather/killrweather - KillrWeather is a reference application (work in progress) showing how to easily integrate streaming and batch data processing with Apache Spark Streaming, Apache Cassandra, Apache Kafka and Akka for fast, streaming computations on time series data in asynchronous event-driven environments.
apache/griffin - Mirror of Apache griffin (archived)
sifive/freedom - Source files for SiFive's Freedom platforms (archived)
lensesio/stream-reactor - A collection of Kafka Connect sinks and sources maintained by Lenses.io.
airbnb/chronon - Chronon is a data platform for serving for AI/ML applications.
mpeltonen/sbt-idea - A simple-build-tool (sbt) plugin/processor for creating IntelliJ IDEA project files
firesim/firesim - FireSim: Fast and Effortless FPGA-accelerated Hardware Simulation with On-Prem and Cloud Flexibility
databricks/spark-csv - CSV Data Source for Apache Spark 1.x (archived)
twitter/cassovary - Cassovary is a simple big graph processing library for the JVM
TIBCOSoftware/snappydata - Project SnappyData - memory optimized analytics database, based on Apache Spark™ and Apache Geode™. Stream, Transact, Analyze, Predict in one cluster
NVIDIA/cudf-spark - NVIDIA cuDF for Apache Spark plugin - accelerate Apache Spark with GPUs
cloudera/livy - Livy is an open source REST interface for interacting with Apache Spark from anywhere
elipsitz/gamebub - Open-source FPGA retro emulation handheld
amplab/shark - Development in Shark has been ended.
THU-DSP-LAB/ventus-gpgpu - GPGPU processor supporting RISCV-V extension, developed with Chisel HDL
apache/livy - Apache Livy is an open source REST interface for interacting with Apache Spark from anywhere.
delta-io/delta-sharing - An open protocol for secure data sharing
sscarduzio/elasticsearch-readonlyrest-plugin - Free Elasticsearch security plugin and Kibana security plugin: super-easy Kibana multi-tenancy, Encryption, Authentication, Authorization, Auditing
dbpedia/extraction-framework - The software used to extract structured data from Wikipedia
RedisLabs/spark-redis - A connector for Spark that allows reading and writing to/from Redis cluster
typelevel/kind-projector - Compiler plugin for making type lambdas (type projections) easier to write
BIDData/BIDMach - CPU and GPU-accelerated Machine Learning Library
twitter/twitter-korean-text - Korean tokenizer
pingcap/tispark - TiSpark is built for running Apache Spark on top of TiDB/TiKV (archived)
LucaCanali/sparkMeasure - This repository contains the development code for sparkMeasure, an Apache Spark performance analysis and troubleshooting library. It simplifies collecting, aggregating, and exporting Spark task/stage metrics, and is designed for practical use by developers and data engineers in interactive analysis, testing, and production monitoring workflows.
raymondchins/Bridgeplay - Free fork of NotProton: Windows Steam games in Mac Steam, on CodeWeavers' Wine and Apple's Game Porting Toolkit
XiaoMi/MiNLP - XiaoMi Natural Language Processing Toolkits
akka/akka-samples - Akka Sample Projects (archived)
fehmicansaglam/progressed.io - progressbar microservice (archived)
mrpowers-io/spark-daria - Essential Spark extensions and helper methods ✨😲
cloudstateio/cloudstate - Distributed State Management for Serverless (archived)
allenai/pdffigures2 - Given a scholarly PDF, extract figures, tables, captions, and section titles.
dbpedia-spotlight/dbpedia-spotlight - DBpedia Spotlight is a tool for automatically annotating mentions of DBpedia resources in text. (archived)
ucb-bar/chisel-tutorial - chisel tutorial exercises and answers
ucb-bar/riscv-sodor - educational microarchitectures for risc-v isa
apache/incubator-toree - Mirror of Apache Toree (Incubating)
chipsalliance/firrtl - Flexible Intermediate Representation for RTL (archived)
gregdurrett/berkeley-doc-summarizer - The Berkeley Document Summarizer is a learning-based, single-document summarization system that extracts source document content, exploits syntactic information to compress it, and uses coreference constraints to ensure clarity.
RayRoestenburg/akka-in-action - Accompanying source code for akka in action
ezhulenev/orderbook-dynamics - Modeling high-frequency limit order book dynamics with support vector machines
databricks/tensorframes - [DEPRECATED] Tensorflow wrapper for DataFrames on Apache Spark
ruippeixotog/scala-scraper - A Scala library for scraping content from HTML pages
Normation/rudder - Rudder is a configuration and security automation platform. Manage your Cloud, hybrid or on-premises infrastructure in a simple, scalable and dynamic way.
sbt/sbt-eclipse - Plugin for sbt to create Eclipse project definitions
RBMHTechnology/eventuate - Global-scale event sourcing and event collaboration with causal consistency (This project is in maintenance mode. Only critical bugs will be fixed, but there is no more feature development.). (archived)
scalafx/scalafx - ScalaFX simplifies creation of JavaFX-based user interfaces in Scala
CSUG/HouseMD - HouseMD is an awesome diagnosing tool better than BTrace (archived)
ShiftLeftSecurity/codepropertygraph - Code Property Graph: specification, query language, and utilities
rchain/rchain - Blockchain (smart contract) platform using CBC-Casper proof of stake + Rholang for concurrent execution.
TalkingData/Fregata - A light weight, super fast, large scale machine learning library on spark .
actionml/universal-recommender - Highly configurable recommender based on PredictionIO and Mahout's Correlated Cross-Occurrence algorithm
open-korean-text/open-korean-text - Open Korean Text Processor - An Open-source Korean Text Processor
seglo/kafka-lag-exporter - Monitor Kafka Consumer Group Latency with Kafka Lag Exporter (archived)
sameeragarwal/blinkdb - BlinkDB: Sub-Second Approximate Queries on Very Large Data.
twitter/bijection - Reversible conversions between types
scoverage/sbt-scoverage - sbt plugin for scoverage
databricks/reference-apps - Spark reference applications
softwaremill/codebrag - Your daily code review tool (archived)
chandu0101/sri - Build truly native cross platform (web,ios,android) apps using scalajs and react, react-native
apalache-mc/apalache - APALACHE: symbolic model checker for TLA+ and Quint
ucb-bar/riscv-mini - Simple RISC-V 3-stage Pipeline in Chisel (archived)
nixiesearch/nixiesearch - Hybrid search engine, combining best features of text and semantic search worlds
CircleCI-Archived/vamp - Vamp - canary releasing and autoscaling for microservice systems (archived)
amplab/SparkNet - Distributed Neural Networks for Spark
databricks/spark-redshift - Redshift data source for Apache Spark
MethodJiao/PkpmSpark - awesome 三维数据挖掘数据分析 & 推荐
ge0rg/aprsdroid - APRSdroid - Geo-Location for Radio Amateurs
t2v/play2-auth - Play2.x Authentication and Authorization module
xubo245/SparkLearning - Learning Apache spark,including code and data .Most part can run local.
qubole/sparklens - Qubole Sparklens tool for performance tuning Apache Spark
stanch/reftree - Automatically generated diagrams and animations for Scala data structures
apicollective/apibuilder - Simple, Comprehensive Tooling for Modern APIs
tumblr/collins - groovy kind of love
Yubico/java-webauthn-server - Server-side Web Authentication library for Java https://www.w3.org/TR/webauthn/#rp-operations
Netflix/edda - AWS API Read Cache
enragedginger/akka-quartz-scheduler - Quartz Extension and utilities for cron-style scheduling in Akka
sbt/sbt-buildinfo - I know this because build.sbt knows this.
Interana/eventsim - Event data simulator. Generates a stream of pseudo-random events from a set of users, designed to simulate web traffic.
WhatsApp/eqwalizer - A type-checker for Erlang (archived)
hortonworks-spark/shc - The Apache Spark - Apache HBase Connector is a library to support Spark accessing HBase table as external data source or sink.
struppigel/PortEx - Java library to analyse Portable Executable files with a special focus on malware analysis and PE malformation robustness
typelevel/kittens - Automatic type class derivation for Cats
orbeon/orbeon-forms - Orbeon Forms - Build, run, and manage web forms on-premises or in the cloud.
tofu-tf/tofu - Functional programming toolbox
high-performance-spark/high-performance-spark-examples - Examples for High Performance Spark
databricks/spark-avro - Avro Data Source for Apache Spark (archived)
harsha2010/magellan - Geo Spatial Data Analytics on Spark
xebia-functional/macroid - A modular functional UI language for Android (archived)
druid-io/tranquility - Tranquility helps you send real-time event streams to Druid and handles partitioning, replication, service discovery, and schema rollover, seamlessly and without downtime.
ergoplatform/ergo - Ergo protocol description & reference client implementation
mongodb/casbah - Casbah is now officially end-of-life (EOL). (archived)
databricks/spark-xml - XML data source for Spark SQL and DataFrames (archived)
stephenmcd/curiodb - Distributed NoSQL Database
shafiab/HashtagCashtag - My Insight Data Engineering Fellowship project. I implemented a big data processing pipeline based on lambda architecture, that aggregates Twitter and US stock market data for user sentiment analysis using open source tools - Apache Kafka for data ingestions, Apache Spark & Spark Streaming for batch & real-time processing, Apache Cassandra f or storage, Flask, Bootstrap and HighCharts f or frontend.
huawei-noah/streamDM - Stream Data Mining Library for Spark Streaming
Alkaar/resy-booking-bot - 🔫 Helps to snipe hard to get reservations at restaurants that use resy
foursquare/rogue - MOVED - The project is still under development but this page is deprecated.
salat/salat - Salat is a simple serialization library for case classes. (archived)
topshell-language/topshell - TopShell - a purely functional, reactive scripting language
effekt-lang/effekt - A language with lexical effect handlers and lightweight effect polymorphism
amplab/keystone - Simplifying robust end-to-end machine learning on Apache Spark.
dlwh/epic - Archived Epic is a high performance statistical parser written in Scala, along with a framework for building complex structured prediction models. (archived)
knowitall/openie - Quality information extraction at web scale.
debasishg/frdomain - Code repo for Functional and Reactive Domain Modeling
twitter/storehaus - Storehaus is a library that makes it easy to work with asynchronous key value stores
spring-attic/spring-scala - (archived)
Centaur/repox - Make sbt more responsive
mrpowers-io/spark-fast-tests - Apache Spark testing helpers (dependency free & works with Scalatest, uTest, and MUnit)
lucidworks/spark-solr - Tools for reading data from Solr as a Spark RDD and indexing objects from Spark into Solr using SolrJ.
play2war/play2-war-plugin - WAR Plugin for Play framework 2.x (archived)
foursquare/twofishes - MOVED - The project is still under development but this page is deprecated.
librecaptcha/lc-core - The LibreCaptcha framework, for self-hosted, privacy respecting CAPTCHAs
microsoft/hyperspace - An open source indexing subsystem that brings index-based query acceleration to Apache Spark™ and big data workloads. (archived)
mardambey/mypipe - MySQL binary log consumer with the ability to act on changed rows and publish changes to different systems with emphasis on Apache Kafka.
IRS-Public/fact-graph - Fact Graph
embeddedkafka/embedded-kafka - A library that provides an in-memory Kafka instance to run your tests against.
typelevel/log4cats - Logging Tools For Interaction with cats-effect
mesos/kafka - Apache Kafka on Apache Mesos
spray/spray-template - SBT template project for quickly getting started with spray-server
philwantsfish/shard - A command line tool to detect shared passwords
precog/platform - Advanced Analytics Engine for NoSQL Data (archived)
allenai/ScienceWorld - ScienceWorld is a text-based virtual environment centered around accomplishing tasks from the standardized elementary science curriculum.
pierre94/flink-notes - flink学习笔记
uber-archive/sql-differential-privacy - Dataflow analysis & differential privacy for SQL queries. This project is deprecated and not maintained. (archived)
alexklibisz/elastiknn - Elasticsearch plugin for nearest neighbor search. Store vectors and run similarity search using exact and approximate algorithms.
databricks/spark-training - Apache Spark training material (archived)
ucb-bar/berkeley-hardfloat
gtache/intellij-lsp - Plugin adding Language Server Protocol support for IntelliJ (archived)
broadinstitute/pilon - Pilon is an automated genome assembly improvement and variant detection tool
findify/s3mock - Embedded S3 server for easy mocking (archived)
rhavyn/norbert - Norbert is a cluster manager and networking layer built on top of Zookeeper.
ucb-bar/chisel2-deprecated
webjars/webjars - Client-side web libraries packaged into JARs
luochana/News_recommend - 基于Spark的新闻推荐系统，包含爬虫项目、web网站以及spark推荐系统
velvia/links - Just a bunch of useful links
earldouglas/sbt-war - Package and run WAR files from sbt
Netflix/osstracker - Github organization OSS metrics collector and metrics dashboard
ray-project/raydp - RayDP provides simple APIs for running Spark on Ray and integrating Spark with AI libraries.
pawelkaczor/ddd-leaven-akka-v2 - Sample e-commerce system #Microservices #Akka #Reactive-DDD #CQRS
nymanjens/facto - Family Accounting Tool
conduktor/kafka-security-manager - Kafka ACL synchronization from CSV/YAML policies through the Admin API. Open source by Conduktor.
sbt/sbt-web - Library for building sbt plugins for the web
apache/tvm-vta - Open, Modular, Deep Learning Accelerator
http4s/blaze - Blazing fast NIO microframework and Http Parser
suzaku-io/boopickle - Binary serialization library for efficient network communication
zio/zio-kafka - A fast Kafka client for ZIO and ZIO Streams
peregin/gps-overlay-on-video - Telemetry (GPS) data overlay on videos
nylonee/watchlistarr - Customizable sync of Plex Watchlist to Sonarr/Radarr
pawelkaczor/akka-ddd - Akka CQRS/ES framework
amplab/graphx - Former GraphX development repository. GraphX has been merged into Apache Spark; please submit pull requests there.
arhelmus/akka-http-rest - Example of reactive REST service written on akka-http with slick
WandererXII/lishogi - ☗ lishogi.org: the forever free, adless and open source shogi server forked from lichess.org ☗
inanna-malick/akka-streams-example
vinyldns/vinyldns - DNS automation and governance for streamlining DNS operations and enabling safe and secure DNS self-service
sbt/sbt-git - A git plugin for sbt
baolibin/Bigdata - 大数据处理相关技术学习之路(持续更新中...)。 Bigdata整理 --> 慢慢滴~ 大数据相关技术包括离线处理，实时处理，OLAP等，如hadoop、spark、flink、hive、hbase、oozie...以及大数据项目，如用户画像、数据仓库等，欢迎感兴趣的小伙伴一起来开发...
jmcardon/tsec - Type-safe general-cryptography library - https://jmcardon.github.io/tsec/ (archived)
creativescala/doodle - Compositional vector graphics in Scala / Scala.JS
boundary/ordasity - Ordasity is Boundary's library for building stateful clustered services on the JVM.
datamechanics/delight - A Spark UI and Spark History Server alternative with CPU and Memory metrics! Delight is free, cross-platform, and open-source. (archived)
derrickburns/generalized-kmeans-clustering - Production-ready K-Means clustering for Apache Spark with pluggable Bregman divergences (KL, Itakura-Saito, L1, etc). 6 algorithms, 740 tests, cross-version persistence. Drop-in replacement for MLlib with mathematically correct distance functions for probability distributions, spectral data, and count data.
scalanlp/nak - The Nak Machine Learning Library
Ldpe2G/DeepLearningForFun - Implementation of some interesting ideas of deeplearning.
apache/bahir - Mirror of Apache Bahir (archived)
jamesward/koober
TiarkRompf/virtualization-lms-core - A Framework for Runtime Code Generation and Compiled DSLs
allenai/openie-standalone - Quality information extraction at web scale. Edit
EcZachly/little-book-of-pipelines - This repository goes over how to handle massive variety in data engineering
apache/texera - Human-AI Collaborative Data Science Using Visual Workflows
SpinalHDL/NaxRiscv
cvrebert/lmvtfy - LMVTFY: Let Me Validate That For You
lightbend/cloudflow - Cloudflow enables users to quickly develop, orchestrate, and operate distributed streaming applications on Kubernetes. (archived)
nymanjens/quizmaster - A web-app for conducting a quiz over the internet
akka/akka-persistence-cassandra - A replicated Akka Persistence journal backed by Apache Cassandra
chipsalliance/t1
Hydrospheredata/mist - Serverless proxy for Spark cluster
rpgboss/rpgboss - point and click rpg game editor and engine
cs-au-dk/TIP - Static program analysis for TIP
neo4j/neo4j-spark-connector - Neo4j Connector for Apache Spark, which provides bi-directional read/write access to Neo4j from Spark, using the Spark DataSource APIs
sbt/sbt-dynver - An sbt plugin to dynamically set your version from git
dcaoyuan/chana - Realtime Data Store Based on Akka
Sotera/spark-distributed-louvain-modularity - Spark / graphX implementation of the distributed louvain modularity algorithm
Huawei-Spark/Spark-SQL-on-HBase - Native, optimized access to HBase Data through Spark SQL/Dataframe Interfaces
eBay/Neutrino - Neutrino is a software load balancer(SLB)
djspiewak/gll-combinators - A parser combinator library based on the GLL algorithm
cb372/cats-retry
projectglow/glow - An open-source toolkit for large-scale genomic analysis
databricks/dicer - Dicer auto-sharder: Infrastructure for building sharded services
sbt/sbt-ci-release - sbt plugin to automate Sonatype releases from GitHub Actions
typelevel/cats-mtl - cats transformer type classes.
Verizon/remotely - An elegant RPC system for reasonable people (archived)
levkhomich/akka-tracing - A distributed tracing extension for Akka. Provides integration with Play framework, Spray and Akka HTTP.
Stratio/Spark-MongoDB - Spark library for easy MongoDB access (archived)
Vyxal/Vyxal - A code-golfing language experience that has aspects of traditional programming languages - terse yet convenient.
linkedin/spark-tfrecord - Read and write Tensorflow TFRecord data from Apache Spark.
banana-rdf/banana-rdf - Banana RDF
actionml/harness - Harness is a Machine Learning/AI Server with plugins for many algorithms including the Universal Recommender
Comcast/sirius - A distributed system library for managing application reference data
nerdammer/spark-hbase-connector - Connect Spark to HBase for reading and writing data with ease
apache/incubator-retired-gearpump - Mirror of Apache Gearpump (Incubating) (archived)
http4s/rho - A self documenting DSL built on http4s
cb372/sbt-explicit-dependencies
rockthejvm/udemy-scala-beginners
stanford-ppl/spatial - Spatial: "Specify Parameterized Accelerators Through Inordinately Abstract Language"
microsoft/sql-spark-connector - Apache Spark Connector for SQL Server and Azure SQL (archived)
fix-macosx/net-monitor - Toolkit for auditing "phone home" behavior on Mac OS X Yosemite.
typelevel/fs2-grpc - gRPC implementation for FS2/cats-effect
ktoso/akka-raft - A toy project implementing RAFT on top of Akka Cluster (not prod ready) (archived)
hbutani/spark-druid-olap - Sparkline BI Accelerator provides fast ad-hoc query capability over Logical Cubes. This has been folded into our SNAP Platform(http://bit.ly/2oBJSpP) an Integrated BI platform on Apache Spark. (archived)
KarolS/millfork - Millfork: a middle-level programming language targeting 6502- and Z80-based microcomputers and home consoles
xebia-functional/translate-bubble-android - Translations without interruptions (archived)
cloudera-labs/SparkOnHBase - SparkOnHBase (archived)
guardian/typerighter - Even if you’re the right typer, couldn’t hurt to use Typerighter!
MoeOrganization/moe - An -OFun prototype of an Ultra Modern Perl 5
llm4s/llm4s - Agentic and LLM Programming in Scala
scalapb/zio-grpc - ScalaPB meets ZIO: write purely functional gRPC services and clients using ZIO
es-meta/esmeta - ECMAScript Specification (ECMA-262) Metalanguage
guardian/riff-raff - The Guardian's deployment platform
krasserm/akka-analytics - Large-scale event processing with Akka Persistence and Apache Spark
overview/overview-server - Open source large document set visualization platform
spark-in-action/first-edition - The book's repo
apache/incubator-s2graph - Mirror of Apache S2Graph (Incubating) (archived)
BIDData/BIDMat - A CPU and GPU-accelerated matrix library for data mining
unibas-gravis/scalismo - Scalable Image Analysis and Shape Modelling
hortonworks-spark/spark-atlas-connector - A Spark Atlas connector to track data lineage in Apache Atlas
SpinalHDL/VexiiRiscv - Like VexRiscv, but, Harder, Better, Faster, Stronger
waps101/AlbedoMM - Albedo Morphable Model
sbt/sbt-onejar - Packages your project using One-JAR™
MichalStrehovsky/sizegame - Compare binary sizes of canonical Hello World in 18 different languages
LinkedInAttic/scanns - A scalable nearest neighbor search library in Apache Spark
jliszka/probability-monad
scalanlp/chalk - Chalk is a natural language processing library. (archived)
QianmiOpen/bugatti - 运维自动化部署监控平台
reactors-io/reactors - A foundational framework for distributed programming.
cequence-io/openai-scala-client - Scala client for OpenAI API and other major LLM providers
dcaoyuan/spray-socketio - socket.io for spray
foursquare/fsqio - A monorepo that holds all of Foursquare's opensource projects
oap-project/gazelle_plugin - Native SQL Engine plugin for Spark SQL with vectorized SIMD optimizations. (archived)
bazeltools/bazel-deps - Generate bazel dependencies for maven artifacts
getclump/clump - A library for expressive and efficient service composition
akka/akka-management - Akka Management is a suite of tools for operating Akka Clusters.
amplab/spark-indexedrdd - An efficient updatable key-value store for Apache Spark
dlwh/puck - Puck is a lightning-fast parser for natural languages using GPUs
kitlangton/zio-magic - Construct ZLayers automagically (w/ helpful compile-time errors) (archived)
knowitall/ollie - Ollie is a open information extractor that uses bootstrapped dependency paths.
mbknor/mbknor-jackson-jsonSchema - Generate JSON Schema with Polymorphism using Jackson annotations
silk-framework/silk - Silk Linked Data Integration Framework
lightbend/paradox - Markdown documentation
lomigmegard/akka-http-cors - Akka Http directives implementing the CORS specifications defined by W3C
mschuwalow/zio-todo-backend - Todo-Backend (https://www.todobackend.com/) implementation using ZIO, http4s, doobie and circe
ucb-bar/dsptools - A Library of Chisel3 Tools for Digital Signal Processing
dragos/dragos-vscode-scala - (archived)
LeechanX/Netflix-Recommender-with-Spark - 基于Apache Spark的Netflix电影的离线与实时推荐系统
kakao/s2graph - This code base is retained for historical interest only, please visit Apache Incubator Repo for latest one (archived)
apache/hbase-connectors - Apache HBase Connectors
zhengruifeng/spark-libFM - An implement of Factorization Machines (LibFM)
typelevel/cats-parse - A parsing library for the cats ecosystem
unibas-gravis/parametric-face-image-generator - Generate fully parametric face images from the Basel Face Model 2017
vaquarkhan/Apache-Kafka-poc-and-notes
AbsaOSS/ABRiS - Avro SerDe for Apache Spark structured APIs.
Tactical-Advantage-Trading/wallet - ECX and BTC wallet for Android. Account control tool for Tactical Advantage clients.
tototoshi/slick-joda-mapper - Slick with JodaTime
chadyuu/riscv-chisel-book
CODAIT/spark-bench - Benchmark Suite for Apache Spark
midonet/midonet - MidoNet is an Open Source network virtualization system for Openstack clouds
koeninger/kafka-exactly-once
jdegoes/functional-design - Exercises for the course 'Functional Design by John A. De Goes
sangria-graphql/sangria-akka-http-example - An example GraphQL server written with akka-http, circe and sangria
saurfang/spark-knn - k-Nearest Neighbors algorithm on Spark
ucb-bar/constellation - A Chisel RTL generator for network-on-chip interconnects
dataArtisans/flink-streaming-demo
schoeberl/chisel-lab - Lab exercises for Chisel in the digital electronics 2 course at DTU
scalacenter/scalajs-bundler
titicaca/spark-iforest - Isolation Forest on Spark
VaughnVernon/ReactiveMessagingPatterns_ActorModel - The examples for the book "Reactive Messaging Patterns with the Actor Model"
hkust-taco/mlscript - The MLscript programming language. Functional and object-oriented; structurally typed and sound; with powerful type inference. Soon to have full interop with TypeScript!
johnynek/bosatsu - A python-ish pure and total functional programming language
khronus/khronus - A reactive time series database
muuki88/sbt-native-packager-examples - A set of sbt-native-pakager examples
ucb-bar/chiseltest - The batteries-included testing and formal verification library for Chisel-based RTL designs. (archived)
unibas-gravis/basel-face-pipeline
viperproject/gobra - Gobra is an automated, modular verifier for Go programs, based on the Viper verification infrastructure.
smallnest/douban-recommender - 基于Spark ML实现的豆瓣电影推荐系统 (archived)
snowflakedb/spark-snowflake - Snowflake Data Source for Apache Spark.
wix-incubator/exodus - Easily migrate your JVM code from Maven to Bazel
databrickslabs/overwatch - THIS PROJECT IS DEPRECATED. Capture deep metrics on one or all assets within a Databricks workspace (archived)
iron-io/dockerworker - The new IronWorker workflow examples. Test locally, then upload and start queuing jobs!
jboner/akka-crdt - Server-managed CRDTs based on Akka
ucb-bar/riscv-torture - RISC-V Torture Test
bu-icsg/dana - Dynamically Allocated Neural Network Accelerator for the RISC-V Rocket Microprocessor in Chisel
digital-preservation/csv-validator - CSV Validation Tool and API (CSV Schema RI)
krasserm/akka-persistence-cassandra - A replicated Akka Persistence journal backed by Apache Cassandra
guardian/gu-who - answering: who are all these users in my GitHub org? (archived)
kurrent-io/EventStore.JVM - Event Store JVM Client (archived)
lancewalton/treelog - Allows logging in a tree structure so that comprehensive logging does not become incomprehensible
FRosner/drunken-data-quality - Spark package for checking data quality
ReactiveDesignPatterns/CodeSamples - Code snippets appearing in the book are excerpts from these complete and tested samples.
dcaoyuan/spray-websocket - WebSocket for spray-can
stanford-ppl/Delite - The Delite Git Repo
ClickHouse/spark-clickhouse-connector - Spark ClickHouse Connector build on DataSourceV2 API
FlinkML/flink-tensorflow - flink-tensorflow - TensorFlow support for Apache Flink (archived)
ldaniels528/trifecta - Trifecta is a web-based and CLI tool that simplifies inspecting Kafka messages and Zookeeper data. Additionally, the CLI tool provides the capability to import/export data to/from ElasticSearch and MongoDB.
nafg/reactive - A simple FRP library and a web UI framework built on it (archived)
starlake-ai/starflow - Declarative text based tool for data analysts and engineers to extract, load, transform and orchestrate their data pipelines.
lift-project/lift - The Lift programming language and compiler
maxcom/lorsource - Linux.org.ru website engine
nkallen/querulous - An agreeable way to talk to your database.
mkuthan/example-spark - Spark, Spark Streaming and Spark SQL unit testing strategies
patriknw/akka-data-replication - Replication of CRDTs in Akka Cluster
jamesward/play-auto-refresh
joa/apparat - A framework to optmize ABC, SWC and SWF files.
phatak-dev/spark2.0-examples - Examples of Spark 2.0
SingularityKChen/dl_accelerator - Deep Learning Accelerator Based on Eyeriss V2 Architecture with custom RISC-V extended instructions
strongtyped/active-slick - Slick extensions for record lifecycle management (archived)
skrusche63/spark-elastic - This project combines Apache Spark and Elasticsearch to enable mining & prediction for Elasticsearch.
pawelkaczor/ddd-leaven-akka - Reactive DDD with Akka
Stratio/spark-rabbitmq - RabbitMQ Spark Streaming receiver (archived)
AbsaOSS/spline-spark-agent - Spline agent for Apache Spark
Adi23041999/UpstateLiberty
hseeberger/constructr - Coordinated (etcd, ...) cluster construction for dynamic (cloud, containers) environments (archived)
Qihoo360/XSQL - Unified SQL Analytics Engine Based on SparkSQL
sunbow1/SparkMLlibDeepLearn - SparkMLlibDeepLearn深度学习
VCA-EPFL/FSA - FSA: Fusing FlashAttention within a Single Systolic Array
lightbend/kafka-with-akka-streams-kafka-streams-tutorial - Code samples for the Lightbend tutorial on writing microservices with Akka Streams, Kafka Streams, and Kafka
neoremind/kraps-rpc - A RPC framework leveraging Spark RPC module
headinthebox/CourseraCodeSamplesReactiveProgramming
cld378632668/A-community-detect-System-based-on-GraphX - 图计算和图存储在国内兴起于2012年，此项目为我的本科毕业设计，本人现在TOP厂商工作，工作要求不方便公开透露公司，曾研究图数据库2年，实验室数据库技术从2000年以前开始积累，对外低调，如有工作需要可以推荐！
laserdisc-io/fs2-aws - fs2 utilities to interact with AWS
deng0515001/lnglat2Geo - 经纬度转省市区县乡镇离线包，采用空间查询算法，速度快(单线程5w次/s)，省市区县100%准确率。
djspiewak/emm - A general monad for managing stacking effects (archived)
echen/link-prediction - Solution to Facebook's link prediction contest on Kaggle.
walfie/gbf-raidfinder - Granblue Raid Finder (Archived: Granblue no longer has raid tweets) (archived)
cookeem/CookIM - Distributed web chat application base websocket built on akka.
input-output-hk/scrypto - Cryptographic primitives for Scala
Duhemm/sbt-errors-summary - sbt plugin to show a summary of compilation messages.
krasserm/akka-persistence-kafka - A replicated Akka Persistence journal backed by Apache Kafka
leon/play-salat - MongoDB / Salat plugin for Play 2 [MOVED] (archived)
non/antimirov - algebraic manipulation of regular expressions
wuhx/shelldroid - Create Virtual Environment for your Android Apps
sbt/sbt-github-actions - An sbt plugin which makes it easier to build with GitHub Actions
jflanigan/jamr - JAMR Parser and Generator
mrsqueeze/spark-hash - Locality Sensitive Hashing for Apache Spark
apache/pekko-http - The Streaming-first HTTP server/module of Apache Pekko
arguslab/Argus-SAF - Argus static analysis framework
CrestOfWave/Spark-2.3.1 - Spark-2.3.1源码解读
bizzabo/play-json-extensions - +22 field case class formatter and more for play-json
lagom/online-auction-scala - (archived)
ProjectSeptemberInc/freek - Freek, a freaky simple Free to combine your DSL seamlessly
nadimbahadoor/allaboutscala - Source code for www.allaboutscala.com tutorials
jdegoes/zio-workshop - Real World Functional Programming with ZIO
sifive/sifive-blocks - Common RTL blocks used in SiFive's projects
to-ithaca/libra - A dimensional analysis library based on dependent types
typelevel/feral - Feral cats are homeless, feral functions are serverless
dbpedia/lookup - Outputs a list of ranked DBpedia resources for a search string.
jdegoes/functional-effects - The exercises for the Functional Effects workshop
julienrf/play-json-derived-codecs
VirtusLab/orca - Deterministic, AI-driven development flows.
Y1ran/Spark-The-Definitive-Guide-Chinese-Traslation-2019 - Spark权威指南( Spark The Definitive Guide) -中文版翻译项目
gregdurrett/berkeley-entity - The Berkeley Entity Resolution System jointly solves the problems of named entity recognition, coreference resolution, and entity linking with a feature-rich discriminative model.
mc2-project/opaque-sql - An encrypted data analytics platform
ShapeNet/shapenet-viewer - ShapeNet Viewer
cb372/scala-typed-holes
mdr/ascii-graphs - Parse ASCII art diagrams of graphs (nodes and edges)
ScalaConsultants/reactive-rabbit - Reactive Streams driver for AMQP protocol. Powered by RabbitMQ library.
typelevel/grackle - Grackle: Functional GraphQL for the Typelevel stack
fauna/faunadb
typelevel/machinist - Spire's macros for zero-cost operator enrichment (archived)
Nycto/Hasher - A small Scala library for easily generating hashes (md5, sha1, sha256, sha512, crc32, bcrypt, hmacs, pbkdf2)
dbpedia-spotlight/dbpedia-spotlight-model - DBpedia Spotlight is a tool for automatically annotating mentions of DBpedia resources in text. Improving Efficiency and Accuracy in Multilingual Entity Extraction approach
MaxXSoft/Fuxi - Fuxi (伏羲) is a 32-bit pipelined RISC-V processor written in Chisel.
twitter/twemoji-parser - A simple library for identifying emoji entities within a string in order to render them as Twemoji.
xebia-functional/nine-cards-v2 - An Open Source Android Launcher built with Scala on Android (archived)
banzaicloud/spark-metrics - Spark metrics related custom classes and sinks (e.g. Prometheus)
polomarcus/Spark-Structured-Streaming-Examples - Spark Structured Streaming / Kafka / Cassandra / Elastic
tofu-tf/derevo - Multiple instance derivations inside a single macro annotation
txbits/txbits - DISCLAIMER: TxBits is not affiliated with any active exchanges. Use them at your own risk and beware of any that violate the AGPL license terms by not releasing their source code as required.
CM-Well/CM-Well - CM-Well - a data warehouse for your knowledge graph
unibas-gravis/basel-face-model-viewer - Simple Viewer for the Basel Face Model 2017
sclasen/akka-kafka
yaooqinn/spark-authorizer - A Spark SQL extension which provides SQL Standard Authorization for Apache Spark | This repo is contributed to Apache Kyuubi | 项目已迁移至 Apache Kyuubi
t3hnar/scala-bcrypt - Scala wrapper for jBcrypt + pom.xml inside
bplawler/crawler - Scala DSL for web crawling
P7h/Spark-MLlib-Twitter-Sentiment-Analysis - :star2: :sparkles: Analyze and visualize Twitter Sentiment on a world map using Spark MLlib
scala/scala-swing - Scala wrappers for Java's Swing API for desktop GUIs
scalacenter/scalac-profiling - Compilation profiling tool for Scala 2 projects
STHSF/TextRank - 基于PageRank的TextRank方法, 可以应用于中文关键词、短语、摘要提取程序，代码使用Scala编写。
almond-sh/almond-spark - Run spark calculations from Almond
dyweb/scrala - Unmaintained :whale: :coffee: :spider: Scala crawler(spider) framework, inspired by scrapy, created by @gaocegege
JohnReedLOL/scala-trace-debug - Macro based print debugging. Locates log statements in your IDE.
roboscala/sbt-robovm - An sbt plugin for iOS development in Scala
scalacenter/advisoryboard - Scala Center Advisory Board planning
mikolak-net/travesty - Diagram- and graph-generating library for Akka Streams

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