The Scala Library Index

Scala Versions

Scala 3.x

2312 projects

Scala 2.13

3541 projects

Other versions: 2.12 2.11 2.10

Platforms

Scala.js 1.x

1021 projects

Other versions: 0.6

Scala Native 0.5

342 projects

Other versions: 0.4 0.3

Build Tool Plugins

sbt 2.x

89 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

sake92/deder-plugins

Official Deder plugins

05 Jun 2026 at 10:34 (UTC)

sideeffffect/dapr4s

Scala 3 library exposing Dapr building blocks as capture-checked capabilities

03 Jun 2026 at 01:40 (UTC)

shuwariafrica/sbt-snx

02 Jun 2026 at 20:50 (UTC)

indoorvivants/sbt-revolver

An SBT plugin for dangerously fast development turnaround in Scala

02 Jun 2026 at 15:08 (UTC)

starlake-ai/quack-on-demand

Production-grade Arrow FlightSQL gateway in front of DuckDB Quack + DuckLake. Multi-tenant pools, pluggable auth (DB/JWT/OIDC), table-level ACLs, role-aware routing, and a live admin console

02 Jun 2026 at 00:25 (UTC)

digital-asset/canton

Global Workflow Composition that is Scalable, Secure, and GDPR-compliant

27 May 2026 at 16:12 (UTC)

cetic/oscar-cbls

oscar-cbls

21 May 2026 at 14:59 (UTC)

jamesward/zio-http-guard

20 May 2026 at 20:25 (UTC)

alexdupre/klaviyo4s

Scala 3 code generator for the Klaviyo API

20 May 2026 at 09:09 (UTC)

jamesward/zio-bedrock-converse

20 May 2026 at 01:17 (UTC)

profunktor/valkey4cats

:construction: Valkey client built on top of Cats Effect and Glide-Java

18 May 2026 at 01:43 (UTC)

kubuszok/lls

Low-Level Scala - allocation conscious cross-platform utilities

17 May 2026 at 12:25 (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 ...