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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 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
  • mouse Public

    A small companion to cats

    typelevel/mouse’s past year of commit activity
    Scala 376 MIT 66 4 4 Updated Jan 14, 2026
  • cats-effect-testing Public

    Integration between cats-effect and test frameworks

    typelevel/cats-effect-testing’s past year of commit activity
    Scala 191 Apache-2.0 43 8 14 Updated Jan 14, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie’s past year of commit activity
    Scala 2,208 MIT 375 126 4 Updated Jan 14, 2026
  • cats-time Public

    Cats Instances for Java Time

    typelevel/cats-time’s past year of commit activity
    Scala 92 MIT 20 1 1 Updated Jan 14, 2026
  • simulacrum-scalafix Public

    Simulacrum as Scalafix rules

    typelevel/simulacrum-scalafix’s past year of commit activity
    Scala 34 10 6 6 Updated Jan 14, 2026
  • monoids Public

    Generic Monoids for Scala

    typelevel/monoids’s past year of commit activity
    Scala 52 MIT 12 1 5 Updated Jan 14, 2026
  • literally Public

    Compile time validation of literal values built from strings

    typelevel/literally’s past year of commit activity
    Scala 112 Apache-2.0 6 1 0 Updated Jan 14, 2026
  • cats-collections Public

    Data structures for pure functional programming in Scala

    typelevel/cats-collections’s past year of commit activity
    Scala 563 103 14 (1 issue needs help) 3 Updated Jan 13, 2026
  • skunk Public

    A data access library for Scala + Postgres.

    typelevel/skunk’s past year of commit activity
    Scala 1,638 MIT 165 78 (2 issues need help) 13 Updated Jan 14, 2026
  • paiges Public

    an implementation of Wadler's a prettier printer

    typelevel/paiges’s past year of commit activity
    Scala 188 Apache-2.0 30 5 13 Updated Jan 14, 2026
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Sponsors

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