The Scala Library Index

Scala Versions

Scala 3.x

2198 projects

Scala 2.13

3538 projects

Other versions: 2.12 2.11 2.10

Platforms

Scala.js 1.x

996 projects

Other versions: 0.6

Scala Native 0.5

267 projects

Other versions: 0.4 0.3

Build Tool Plugins

sbt 2.x

62 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

edadma/recursive_descent_parser

A table-driven precedence climbing parser

29 Jan 2026 at 23:34 (UTC)

colofabrix/cuttlefish

Functional, type-safe client for the Octopus Energy API

29 Jan 2026 at 11:56 (UTC)

colofabrix/h4sbl

Http4s Better Logging

28 Jan 2026 at 21:56 (UTC)

taig/unimog

Dead simple persistent message bus on top of postgres

28 Jan 2026 at 21:08 (UTC)

colofabrix/declinio

Seamless integration between Decline and Cats Effect without the awkward constructor syntax of Decline.

25 Jan 2026 at 20:20 (UTC)

guardian/play-passkeyauth

A Scala 3 library that enables a Play framework app to authenticate with passkeys.

23 Jan 2026 at 11:49 (UTC)

typelevel/otel4s-sdk

Implementation of the otel4s SDK modules in Scala from scratch

21 Jan 2026 at 21:44 (UTC)

sangria-graphql/sangria-pekko-streams

Sangria pekko-streams integration

20 Jan 2026 at 18:31 (UTC)

philwalk/uni

universal alternative to java.nio.file.Paths that understands MSYS2 filesystem paths and works everywhere

09 Jan 2026 at 22:13 (UTC)

cheleb/sbt-fullstack-js

SBT plugin to ease ScalaJS full stack deployment

31 Dec 2026 at 00:58 (UTC)

natural-transformation/levsha

Fast Scala eDSL for HTML

30 Dec 2026 at 21:46 (UTC)

alejandrohdezma/sbt-dependencies

Manage SBT dependencies from a single YAML file with version markers, auto-updates, and cross-project support

29 Dec 2026 at 17:12 (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)

lightbend/config

configuration library for JVM languages using HOCON files

13 Apr 2012 at 03:51 (UTC)

apache/spark

Apache Spark - A unified analytics engine for large-scale data processing

24 Jan 2014 at 07:19 (UTC)

More ...