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Typelevel

We do functional programming together!
README.md

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 630

  3. scalacheck scalacheck Public

    Property-based testing for Scala

    Scala 2k 398

  4. spire spire Public

    Powerful new number types and numeric abstractions for Scala.

    Scala 1.8k 239

  5. cats-effect cats-effect Public

    The pure asynchronous runtime for Scala

    Scala 2.2k 572

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 336 59

Repositories

Showing 10 of 111 repositories
  • 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 2 7 (2 issues need help) 2 Updated Mar 19, 2026
  • paiges Public

    an implementation of Wadler's a prettier printer

    typelevel/paiges’s past year of commit activity
    Scala 189 Apache-2.0 31 4 14 Updated Mar 19, 2026
  • steward Public

    Runs Scala Steward for Typelevel projects

    typelevel/steward’s past year of commit activity
    6 14 1 1 Updated Mar 19, 2026
  • toolkit Public

    Quickstart your next app with the Typelevel Toolkit!

    typelevel/toolkit’s past year of commit activity
    Scala 98 Apache-2.0 9 8 (1 issue needs help) 13 Updated Mar 19, 2026
  • scalacheck Public

    Property-based testing for Scala

    typelevel/scalacheck’s past year of commit activity
    Scala 1,963 BSD-3-Clause 398 54 (1 issue needs help) 10 Updated Mar 18, 2026
  • cats-time Public

    Cats Instances for Java Time

    typelevel/cats-time’s past year of commit activity
    Scala 94 MIT 20 1 1 Updated Mar 18, 2026
  • cats-effect-testing Public

    Integration between cats-effect and test frameworks

    typelevel/cats-effect-testing’s past year of commit activity
    Scala 194 Apache-2.0 43 8 6 Updated Mar 18, 2026
  • monoids Public

    Generic Monoids for Scala

    typelevel/monoids’s past year of commit activity
    Scala 52 MIT 13 1 5 Updated Mar 18, 2026
  • literally Public

    Compile time validation of literal values built from strings

    typelevel/literally’s past year of commit activity
    Scala 113 Apache-2.0 6 1 0 Updated Mar 18, 2026
  • natchez Public

    functional tracing for cats

    typelevel/natchez’s past year of commit activity
    Scala 340 MIT 78 16 11 Updated Mar 18, 2026
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Sponsors

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  • @yoshinorin
  • @a-nigredo
  • @DavidGregory084
  • @lhns
  • @BalmungSan
  • @b-vennes
  • @lorandszakacs
  • @andrew-selvia
  • Private Sponsor