The Scala Library Index

Scala Versions

Scala 3.x

2265 projects

Scala 2.13

3535 projects

Other versions: 2.12 2.11 2.10

Platforms

Scala.js 1.x

1011 projects

Other versions: 0.6

Scala Native 0.5

307 projects

Other versions: 0.4 0.3

Build Tool Plugins

sbt 2.x

75 projects

Other versions: 1.x 0.13 2.0.0-M4 2.0.0-M3 2.0.0-M2 2.0.0-M1

Mill 0.12

4 projects

Other versions: 0.11 0.10 0.9 0.7 0.6

Recent projects

colofabrix/tado4s

Functional, type-safe client for the Tado API

13 Apr 2026 at 23:34 (UTC)

colofabrix/timeflux

A functional, type-safe client for InfluxDB

13 Apr 2026 at 23:32 (UTC)

guizmaii-opensource/jrubyconcurrentconstantmemoryexcel

Helper to write Excel files as fast as possible with a constant RAM use in JRuby programs

13 Apr 2026 at 12:19 (UTC)

edadma/toml

Cross-platform TOML v1.0.0 parser for Scala 3

13 Apr 2026 at 11:20 (UTC)

golemcloud/golem

Golem Cloud is the agent-native platform for building AI agents and distributed applications that never lose state, never duplicate work, and never require you to build infrastructure.

12 Apr 2026 at 14:52 (UTC)

megafarad/esl4s

A Scala 3 library for communicating with FreeSWITCH via the Event Socket Layer (ESL) protocol. Built on Apache Pekko Streams for reactive, backpressure-aware communication.

12 Apr 2026 at 07:33 (UTC)

polyvariant/named-functions

Micro-library for working with functions with named parameters.

11 Apr 2026 at 01:52 (UTC)

xuwei-k/scala-version-from-sbt-version

10 Apr 2026 at 09:30 (UTC)

indoorvivants/merkle

Diffable and serialisable Merkle tree

06 Apr 2026 at 23:24 (UTC)

alejandrohdezma/sbt-changesets

Changeset-based versioning for Scala multi-module builds (sbt plugin + GitHub Action)

06 Apr 2026 at 14:36 (UTC)

jamesward/zio-http-mcp

05 Apr 2026 at 10:11 (UTC)

philwalk/unifile

expressive platform-portable scala scripting

04 Apr 2026 at 00:05 (UTC)

More ...

Most depended-upon Projects

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

19 Jan 2012 at 19:48 (UTC)

scalatest/scalatest

A testing tool for Scala and Java developers

22 Dec 2012 at 03:43 (UTC)

scala/scala3

The Scala 3 compiler, also known as Dotty.

09 Jun 2016 at 13:04 (UTC)

scala-js/scala-js

Scala.js, the Scala to JavaScript compiler

14 Jan 2014 at 19:54 (UTC)

typelevel/cats

Lightweight, modular, and extensible library for functional programming.

05 Feb 2016 at 02:53 (UTC)

typelevel/scalacheck

Property-based testing for Scala

07 Apr 2013 at 13:37 (UTC)

akka/akka-core

A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.

22 Dec 2012 at 13:22 (UTC)

circe/circe

Yet another JSON library for Scala

10 Aug 2015 at 02:04 (UTC)

etorreborre/specs2

Software Specifications for Scala

13 Jun 2012 at 22:50 (UTC)

typelevel/cats-effect

The pure asynchronous runtime for Scala

21 Apr 2017 at 23:00 (UTC)

scalameta/munit

Scala testing library with actionable errors and extensible APIs

11 Jan 2020 at 22:03 (UTC)

lightbend/config

configuration library for JVM languages using HOCON files

13 Apr 2012 at 03:51 (UTC)

More ...