The Scala Library Index

Scala Versions

Scala 3.x

1802 projects

Scala 2.13

3071 projects

Other versions: 2.12 2.11 2.10

Platforms

Scala.js 1.x

826 projects

Other versions: 0.6

Scala Native 0.5

251 projects

Other versions: 0.4 0.3

Build Tool Plugins

sbt 2.x

112 projects

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

Mill 0.12

1 projects

Other versions: 0.11 0.10 0.9 0.7 0.6

Recent projects

ponkotuy/flyway-play

Play modules for Flyway

09 Jul 2026 at 19:08 (UTC)

early-effect/marklit

Write Scala docs where 2.13 and 3.x live happily in the same Markdown file — every block compiled and run by its own real compiler.

08 Jul 2026 at 16:56 (UTC)

rchillyard/majabigwaduce

A framework to allow MapReduce applications to use Akka actors

08 Jul 2026 at 16:53 (UTC)

early-effect/saferis

A type safe SQL client and interpolator for Scala 3 and ZIO

08 Jul 2026 at 14:35 (UTC)

polyvariant/webauthn4s

Cross-platform (JVM + Scala Native) WebAuthn assertion verifier for Scala 3

07 Jul 2026 at 21:47 (UTC)

alejandrohdezma/sbt-dependencies

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

05 Jul 2026 at 18:38 (UTC)

irevive/fs2-kafka-otel4s

05 Jul 2026 at 10:07 (UTC)

alejandrohdezma/sbt-changesets

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

05 Jul 2026 at 07:44 (UTC)

kubukoz/scala-swift-rpc

03 Jul 2026 at 18:19 (UTC)

virtuslab/sloth

Sloth converts Scala 3.0-3.7 lazy vals to Scala 3.8 lazy vals

02 Jul 2026 at 12:36 (UTC)

kevin-lee/logger-f-sbt-logging

27 Jun 2026 at 18:56 (UTC)

trailbiomed/scala-reporting

Offline report generation in scala

25 Jun 2026 at 10:55 (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/scalacheck

Property-based testing for Scala

07 Apr 2013 at 13:37 (UTC)

typelevel/cats

Lightweight, modular, and extensible library for functional programming.

05 Feb 2016 at 06:15 (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)

etorreborre/specs2

Software Specifications for Scala

13 Jun 2012 at 22:50 (UTC)

circe/circe

Yet another JSON library for Scala

10 Aug 2015 at 02:04 (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

20 Jan 1970 at 15:37 (UTC)

More ...