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The Scala Library Index

    • akka154
    • akka-http58
    • akka-streams58
    • apache-spark38
    • big-data37
    • cats154
    • cats-effect122
    • circe51
    • database58
    • dsl38
    • fp54
    • fs273
    • functional-programming211
    • hacktoberfest80
    • http50
    • http4s55
    • java160
    • jdbc35
    • json130
    • jvm35
    • kafka60
    • library37
    • logging35
    • machine-learning52
    • macros52
    • metrics39
    • mill-plugin40
    • pekko41
    • play-framework61
    • playframework63
    • production56
    • reactive43
    • reactive-streams39
    • sbt271
    • sbt-plugin258
    • scala2270
    • scala-js75
    • scala-library37
    • scala-native70
    • scala382
    • scalajs184
    • scalaz40
    • shapeless39
    • spark205
    • sql54
    • streaming43
    • testing63
    • tracing37
    • typelevel49
    • zio118

    Scala Versions

    Scala 3.x

    2153 projects

    Scala 2.13

    3529 projects

    Other versions: 2.12 2.11 2.10

    Platforms

    Scala.js 1.x

    980 projects

    Other versions: 0.6

    Scala Native 0.5

    253 projects

    Other versions: 0.4 0.3

    Build Tool Plugins

    sbt 2.x

    48 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

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    evolution-gaming/sbt-dependency-rules-plugin

    SBT plugin for enforcing rules on project dependencies

    13 Oct 2025 at 12:20 (UTC)
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    lbialy/filter-native-image-metadata

    11 Oct 2025 at 14:59 (UTC)
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    buntec/ff4s-heroicons

    11 Oct 2025 at 14:29 (UTC)
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    buntec/ff4s-shoelace

    ff4s bindings for Shoelace web components

    11 Oct 2025 at 14:11 (UTC)
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    buntec/ff4s-canvas

    Canvas-based charts for ff4s

    11 Oct 2025 at 13:45 (UTC)
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    h8io/sbt-testkit

    TestKit config for SBT

    11 Oct 2025 at 07:16 (UTC)
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    gemini-hlsw/lucuma-apps

    GPP Scala apps

    09 Oct 2025 at 16:08 (UTC)
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    indoorvivants/forge

    08 Oct 2025 at 14:26 (UTC)
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    herminiogg/shexml-streaming

    A streaming wrapper for ShExML with support for asynchronous data streams

    06 Oct 2025 at 13:59 (UTC)
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    dragonfly-ai/img

    A Scala.js Image Processing Library

    05 Oct 2025 at 16:26 (UTC)
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    pjfanning/pekko-serialization-jackson3

    Jackson 3 equivalent of pekko-serialization-jackson

    04 Oct 2025 at 21:55 (UTC)
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    mateuszkubuszok/hearth

    The first Scala macros' standard library.

    02 Oct 2025 at 22:48 (UTC)
    More ...

    Most depended-upon Projects

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    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)
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    scalatest/scalatest

    A testing tool for Scala and Java developers

    22 Dec 2012 at 03:43 (UTC)
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    scala/scala3

    The Scala 3 compiler, also known as Dotty.

    09 Jun 2016 at 13:04 (UTC)
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    scala-js/scala-js

    Scala.js, the Scala to JavaScript compiler

    14 Jan 2014 at 19:54 (UTC)
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    typelevel/cats

    Lightweight, modular, and extensible library for functional programming.

    05 Feb 2016 at 02:53 (UTC)
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    typelevel/scalacheck

    Property-based testing for Scala

    07 Apr 2013 at 13:37 (UTC)
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    akka/akka

    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)
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    circe/circe

    Yet another JSON library for Scala

    10 Aug 2015 at 02:04 (UTC)
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    etorreborre/specs2

    Software Specifications for Scala

    13 Jun 2012 at 22:50 (UTC)
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    typelevel/cats-effect

    The pure asynchronous runtime for Scala

    21 Apr 2017 at 23:00 (UTC)
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    lightbend/config

    configuration library for JVM languages using HOCON files

    13 Apr 2012 at 03:51 (UTC)
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    apache/spark

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

    24 Jan 2014 at 07:19 (UTC)
    More ...
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