Repositories list

• dotty

  Public
  Research platform for new language concepts and compiler technologies for Scala.

  Scala

  •

  Apache License 2.0

  •1.2k1.2k forks•8484 stars•00 issues•1111 pull requests•Updated May 4, 2026May 4, 2026

• zio

  Public
  ZIO — A type-safe, composable library for asynchronous and concurrent programming in Scala

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  Apache License 2.0

  •1.5k1.5k forks•00 stars•00 issues•3131 pull requests•Updated May 3, 2026May 3, 2026

• cats-effect

  Public
  The purely functional runtime system for Scala

  Scala

  •

  Apache License 2.0

  •572572 forks•00 stars•00 issues•11 pull request•Updated Apr 23, 2026Apr 23, 2026

• scalaz

  Public
  Principled Functional Programming in Scala

  Scala

  •

  Other

  •698698 forks•00 stars•00 issues•00 pull requests•Updated Apr 13, 2026Apr 13, 2026

• geny

  Public
  Provides the geny.Generator data type, the dual to a scala.Iterator that can ensure resource cleanup

  Scala

  •

  Other

  •2424 forks•00 stars•00 issues•33 pull requests•Updated Feb 9, 2026Feb 9, 2026

• requests

  Public
  A Scala port of the popular Python Requests HTTP client: flexible, intuitive, and straightforward to use.

  Scala

  •

  Other

  •9696 forks•00 stars•00 issues•22 pull requests•Updated Jan 15, 2026Jan 15, 2026

• scala-xml

  Public
  The standard Scala XML library

  community-project

  community-project

  Scala

  •

  Apache License 2.0

  •9191 forks•00 stars•00 issues•00 pull requests•Updated Dec 5, 2025Dec 5, 2025

• fs2

  Public
  Compositional, streaming I/O library for Scala

  Scala

  •

  Other

  •629629 forks•00 stars•00 issues•00 pull requests•Updated Dec 1, 2025Dec 1, 2025

• shapeless-3

  Public
  Generic programming for Scala

  Scala

  •2525 forks•11 star•00 issues•00 pull requests•Updated Nov 20, 2025Nov 20, 2025

• util

  Public
  Wonderful reusable code from Twitter

  Scala

  •

  Apache License 2.0

  •571571 forks•00 stars•00 issues•00 pull requests•Updated Nov 20, 2025Nov 20, 2025

• json4s

  Public
  A single AST to be used by other scala json libraries

  Scala

  •

  Apache License 2.0

  •324324 forks•00 stars•00 issues•00 pull requests•Updated Nov 20, 2025Nov 20, 2025

• specs2

  Public
  Software Specifications for Scala

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  Other

  •215215 forks•00 stars•00 issues•00 pull requests•Updated Nov 18, 2025Nov 18, 2025

• scala-java8-compat

  Public
  A Java 8 compatibility kit for Scala.

  Scala

  •

  Apache License 2.0

  •6464 forks•00 stars•00 issues•00 pull requests•Updated Nov 18, 2025Nov 18, 2025

• verify

  Public
  Scala Verify is a minimal testing framework for Scala. Trust, but verify.

  Scala

  •

  Apache License 2.0

  •1818 forks•00 stars•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• Monocle

  Public
  Optics library for Scala

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  MIT License

  •206206 forks•00 stars•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• scala-collection-compat

  Public
  makes a subset of the Scala 2.13 collections API available on 2.11 and 2.12, to aid cross-building

  Scala

  •

  Apache License 2.0

  •8484 forks•00 stars•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• spire

  Public
  Powerful new number types and numeric abstractions for Scala.

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  MIT License

  •238238 forks•00 stars•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• cats

  Public
  Lightweight, modular, and extensible library for functional programming.

  Scala

  •

  Other

  •1.2k1.2k forks•11 star•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• Lucre

  Public
  Lucre (STM|Event|Data|Confluent) - a transactional, persistent, reactive object model. Mirror of https://git.iem.at/sciss/Lucre

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  GNU Affero General Public License v3.0

  •00 forks•00 stars•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• scalatest

  Public
  A testing tool for Scala and Java developers

  Scala

  •

  Apache License 2.0

  •335335 forks•00 stars•00 issues•00 pull requests•Updated Nov 17, 2025Nov 17, 2025

• scas

  Public
  Scala Algebra System

  Scala

  •11 fork•00 stars•00 issues•00 pull requests•Updated Nov 4, 2025Nov 4, 2025

• scalatestplus-testng

  Public
  ScalaTest + TestNG provides integration support between ScalaTest and TestNG.

  Scala

  •

  Apache License 2.0

  •77 forks•00 stars•00 issues•00 pull requests•Updated Oct 31, 2025Oct 31, 2025

• akka

  Public
  Build highly concurrent, distributed, and resilient message-driven applications on the JVM

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  Other

  •3.6k3.6k forks•11 star•00 issues•00 pull requests•Updated Oct 30, 2025Oct 30, 2025

• sconfig

  Public
  Scala cross platform configuration library supporting HOCON

  Scala

  •

  Other

  •1010 forks•00 stars•00 issues•00 pull requests•Updated Oct 22, 2025Oct 22, 2025

• utest-new

  Public
  A simple testing framework for Scala

  Scala

  •

  MIT License

  •8686 forks•00 stars•00 issues•00 pull requests•Updated Oct 22, 2025Oct 22, 2025

• http4s

  Public
  A minimal, idiomatic Scala interface for HTTP

  Scala

  •

  Apache License 2.0

  •808808 forks•00 stars•00 issues•00 pull requests•Updated Oct 21, 2025Oct 21, 2025

• os-lib

  Public
  OS-Lib is a simple, flexible, high-performance Scala interface to common OS filesystem and subprocess APIs

  Scala

  •

  Other

  •8787 forks•00 stars•00 issues•00 pull requests•Updated Oct 21, 2025Oct 21, 2025

• cask

  Public
  Cask: a Scala HTTP micro-framework

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  Other

  •6767 forks•00 stars•00 issues•11 pull request•Updated Oct 21, 2025Oct 21, 2025

• upickle

  Public
  uPickle: a simple, fast, dependency-free JSON & Binary (MessagePack) serialization library for Scala

  community-buildstatus-enabled

  community-buildstatus-enabled

  Scala

  •

  MIT License

  •177177 forks•00 stars•00 issues•00 pull requests•Updated Oct 16, 2025Oct 16, 2025

• sourcecode

  Public
  Scala library providing "source" metadata to your program, similar to Python's __name__, C++'s __LINE__ or Ruby's __FILE__.

  Scala

  •

  Other

  •7777 forks•00 stars•00 issues•00 pull requests•Updated Oct 15, 2025Oct 15, 2025