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Typelevel

We do functional programming together!
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Typelevel is an ecosystem of projects and a community of people united to foster an inclusive, welcoming, and safe environment around functional programming in Scala. Also find us on...

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  1. cats cats Public

    Lightweight, modular, and extensible library for functional programming.

    Scala 5.4k 1.2k

  2. fs2 fs2 Public

    Compositional, streaming I/O library for Scala

    Scala 2.4k 622

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 400

  4. spire spire Public

    Powerful new number types and numeric abstractions for Scala.

    Scala 1.8k 240

  5. cats-effect cats-effect Public

    The pure asynchronous runtime for Scala

    Scala 2.2k 565

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 334 58

Repositories

Showing 10 of 110 repositories
  • munit-cats-effect Public

    Integration library for MUnit & cats-effect

    typelevel/munit-cats-effect’s past year of commit activity
    Scala 154 Apache-2.0 38 5 2 Updated Jan 30, 2026
  • log4cats Public

    Logging Tools For Interaction with cats-effect

    typelevel/log4cats’s past year of commit activity
    Scala 417 Apache-2.0 79 13 13 Updated Jan 30, 2026
  • otel4s-sdk Public

    Implementation of the otel4s SDK modules in Scala from scratch

    typelevel/otel4s-sdk’s past year of commit activity
    Scala 5 Apache-2.0 1 5 4 Updated Jan 30, 2026
  • otel4s Public

    An OpenTelemetry library for Scala based on Cats-Effect

    typelevel/otel4s’s past year of commit activity
    Scala 204 Apache-2.0 45 14 (2 issues need help) 4 Updated Jan 30, 2026
  • kind-projector Public

    Compiler plugin for making type lambdas (type projections) easier to write

    typelevel/kind-projector’s past year of commit activity
    Scala 927 MIT 75 10 (4 issues need help) 0 Updated Jan 29, 2026
  • jawn Public

    Jawn is for parsing jay-sawn (JSON)

    typelevel/jawn’s past year of commit activity
    Scala 436 73 12 6 Updated Jan 29, 2026
  • jawn-fs2 Public

    Integration between jawn and fs2

    typelevel/jawn-fs2’s past year of commit activity
    Scala 38 17 1 4 Updated Jan 29, 2026
  • scalacheck-xml Public

    Scalacheck instances for scala-xml

    typelevel/scalacheck-xml’s past year of commit activity
    Scala 5 1 0 1 Updated Jan 29, 2026
  • case-insensitive Public

    A case-insensitive string for Scala

    typelevel/case-insensitive’s past year of commit activity
    Scala 38 Apache-2.0 15 5 4 Updated Jan 29, 2026
  • keypool Public

    A Keyed Pool Implementation for Scala

    typelevel/keypool’s past year of commit activity
    Scala 39 MIT 16 8 6 Updated Jan 29, 2026
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Sponsors

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  • @andrew-selvia
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