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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 621

  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 564

  6. discipline discipline Public

    Flexible law checking for Scala

    Scala 334 58

Repositories

Showing 10 of 109 repositories
  • typelevel-nix Public

    Development tools for Typelevel projects

    typelevel/typelevel-nix’s past year of commit activity
    Nix 125 Apache-2.0 10 3 3 Updated Jan 7, 2026
  • fs2 Public

    Compositional, streaming I/O library for Scala

    typelevel/fs2’s past year of commit activity
    Scala 2,437 621 99 (7 issues need help) 29 Updated Jan 7, 2026
  • twiddles Public

    Micro-library for building effectful protocols

    typelevel/twiddles’s past year of commit activity
    Scala 69 BSD-3-Clause 4 1 (1 issue needs help) 1 Updated Jan 6, 2026
  • doobie Public

    Functional JDBC layer for Scala.

    typelevel/doobie’s past year of commit activity
    Scala 2,207 MIT 375 126 4 Updated Jan 6, 2026
  • fs2-grpc Public

    gRPC implementation for FS2/cats-effect

    typelevel/fs2-grpc’s past year of commit activity
    Scala 280 MIT 64 8 4 Updated Jan 5, 2026
  • otel4s Public

    An OpenTelemetry library for Scala based on Cats-Effect

    typelevel/otel4s’s past year of commit activity
    Scala 202 Apache-2.0 44 20 (2 issues need help) 4 Updated Jan 3, 2026
  • frameless Public

    Expressive types for Spark.

    typelevel/frameless’s past year of commit activity
    Scala 893 Apache-2.0 138 37 (6 issues need help) 12 Updated Jan 2, 2026
  • steward Public

    Runs Scala Steward for Typelevel projects

    typelevel/steward’s past year of commit activity
    6 13 1 1 Updated Dec 31, 2025
  • weaver-test Public

    A test framework that runs everything in parallel.

    typelevel/weaver-test’s past year of commit activity
    Scala 77 13 27 12 Updated Dec 30, 2025
  • kind-projector Public

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

    typelevel/kind-projector’s past year of commit activity
    Scala 926 MIT 75 10 (4 issues need help) 0 Updated Dec 30, 2025
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Sponsors

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

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