The Scala Library Index

Scala Versions

Scala 2.13

3869 projects

Other versions: 2.12 2.11 2.10

Platforms

Build Tool Plugins

sbt 2.x

171 projects

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

Mill 1.x

3 projects

Other versions: 0.12 0.11 0.10 0.9 0.7 0.6

Recent projects

apache/fory

A blazingly fast multi-language serialization framework for idiomatic domain objects, schema IDL, and cross-language data exchange.

28 Jul 2026 at 07:13 (UTC)

alejandrohdezma/sbt-bom

Generate Bill of Materials (BOM) poms from your sbt build

25 Jul 2026 at 16:46 (UTC)

wegenenverkeer/rxhttpclient

A Reactive HTTP Client

23 Jul 2026 at 16:24 (UTC)

edadma/mlt

Scala Native bindings for MLT

16 Jul 2026 at 13:18 (UTC)

shuwariafrica/boilerplate

Collection of utilities and common patterns useful across Scala 3 projects

12 Jul 2026 at 02:32 (UTC)

early-effect/sbt-dynver-ci

Cache-friendly sbt-dynver policy for CI (stable jar names between tags)

12 Jul 2026 at 02:09 (UTC)

shuwariafrica/emile

Scala Native async I/O, built on libuv, integrated with cats-effect.

11 Jul 2026 at 17:09 (UTC)

early-effect/specular

Code-first tests-as-docs site generator for Scala — DocSpecs that assert in CI and SSR-render through ascent.

11 Jul 2026 at 01:04 (UTC)

early-effect/ascent

Effect-native reactive UI for Scala 3. Renders straight to the DOM — no virtual DOM, no diffing — with ZIO effects, typed errors, and resource-safe lifecycles first-class. Build your UI the way you build the rest of your ZIO app.

10 Jul 2026 at 22:48 (UTC)

ponkotuy/flyway-play

Play modules for Flyway

09 Jul 2026 at 19:08 (UTC)

kaizen-solutions/zio-telemetry-extras

OpenTelemetry integrations built for the Scala ecosystem using zio-telemetry

08 Jul 2026 at 23:49 (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)

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)