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  1. project logo

    typelevel/cats

    Lightweight, modular, and extensible library for functional programming.

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    4870 382
  2. project logo

    scalaz/scalaz

    Principled Functional Programming in Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    4609 190
  3. project logo

    scala-native/scala-native

    Your favorite language gets closer to bare metal.

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala Native versions: 0.4 0.3
    sbt plugins: 1.0 0.13
    4289 119
  4. project logo

    zio/zio

    ZIO — A type-safe, composable library for async and concurrent programming in Scala

    Scala versions: 3.x 2.13 2.12 2.11
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    3748 399
  5. project logo

    milessabin/shapeless

    Generic programming for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    3326 123
  6. project logo

    http4s/http4s

    A minimal, idiomatic Scala interface for HTTP

    Scala versions: 3.x 2.13 2.12
    Scala.js versions: 1.x
    Scala Native versions: 0.4
    2393 1031 341
  7. project logo

    circe/circe

    Yet another JSON library for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    2377 217
  8. project logo

    typelevel/fs2

    Compositional, streaming I/O library for Scala

    Scala versions: 3.x 2.13 2.12 2.11
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    2215 243
  9. project logo

    typelevel/scalacheck

    Property-based testing for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    1857 117
  10. project logo

    typelevel/cats-effect

    The pure asynchronous runtime for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    1746 116
  11. project logo

    typelevel/spire

    Powerful new number types and numeric abstractions for Scala.

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    1720 90
  12. project logo

    fthomas/refined

    Refinement types for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    1602 62
  13. project logo

    optics-dev/monocle

    Optics library for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    1568 109
  14. project logo

    tpolecat/skunk

    A data access library for Scala + Postgres.

    Scala versions: 3.x 2.13 2.12
    Scala.js versions: 1.x
    Scala Native versions: 0.4
    1431 52
  15. project logo

    scopt/scopt

    command line options parsing for Scala

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    1394 54
  16. project logo

    json4s/json4s

    JSON library

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x
    Scala Native versions: 0.4
    1441 91
  17. project logo

    softwaremill/sttp

    The Scala HTTP client you always wanted!

    Scala versions: 3.x 2.13 2.12 2.11
    Scala.js versions: 1.x
    Scala Native versions: 0.4
    1344 149
  18. project logo

    scalapb/scalapb

    Protocol buffer compiler for Scala.

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4 0.3
    sbt plugins: 0.13
    1241 98
  19. project logo

    softwaremill/tapir

    Declarative, type-safe web endpoints library

    Scala versions: 3.x 2.13 2.12
    Scala.js versions: 1.x
    Scala Native versions: 0.4
    sbt plugins: 1.0
    1187 182
  20. project logo

    lloydmeta/enumeratum

    A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.

    Scala versions: 3.x 2.13 2.12 2.11 2.10
    Scala.js versions: 1.x 0.6
    Scala Native versions: 0.4
    1144 76