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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 401

  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 335 58

Repositories

Showing 10 of 109 repositories
  • fs2-grpc Public

    gRPC implementation for FS2/cats-effect

    typelevel/fs2-grpc’s past year of commit activity
    Scala 280 MIT 63 8 4 Updated Dec 17, 2025
  • cats Public

    Lightweight, modular, and extensible library for functional programming.

    typelevel/cats’s past year of commit activity
    Scala 5,393 1,238 217 (7 issues need help) 42 Updated Dec 17, 2025
  • natchez-http4s Public

    Glorious integration layer for Natchez and Http4s.

    typelevel/natchez-http4s’s past year of commit activity
    Scala 50 MIT 18 4 2 Updated Dec 17, 2025
  • typelevel.g8 Public

    A typelevel.g8 based on sbt-typelevel

    typelevel/typelevel.g8’s past year of commit activity
    Scala 15 6 8 0 Updated Dec 17, 2025
  • cats-collections Public

    Data structures for pure functional programming in Scala

    typelevel/cats-collections’s past year of commit activity
    Scala 562 104 14 (1 issue needs help) 6 Updated Dec 17, 2025
  • scalacheck-effect Public

    Effectful property testing built on ScalaCheck

    typelevel/scalacheck-effect’s past year of commit activity
    Scala 83 Apache-2.0 26 6 2 Updated Dec 16, 2025
  • scalac-options Public

    A library for configuring scalac options

    typelevel/scalac-options’s past year of commit activity
    Scala 45 Apache-2.0 14 7 5 Updated Dec 16, 2025
  • scalacheck Public

    Property-based testing for Scala

    typelevel/scalacheck’s past year of commit activity
    Scala 1,958 BSD-3-Clause 401 54 (1 issue needs help) 9 Updated Dec 16, 2025
  • scalac-compat Public

    Lightweight tools for tackling Scalac version incompatibilities

    typelevel/scalac-compat’s past year of commit activity
    Scala 9 Apache-2.0 3 0 0 Updated Dec 16, 2025
  • discipline-scalatest Public

    ScalaTest binding for Discipline

    typelevel/discipline-scalatest’s past year of commit activity
    Scala 20 MIT 17 1 1 Updated Dec 16, 2025
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Sponsors

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  • @andrew-selvia
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