Repositories list

• natchez

  Public
  functional tracing for cats

  catsscalatracing+ 4

  catsscalatracingopentracinghoneycombjaegercats-effect

  Scala

  •

  MIT License

  •7878 forks•340340 stars•1616 issues•1414 pull requests•Updated Jul 10, 2026Jul 10, 2026

• skunk

  Public
  A data access library for Scala + Postgres.

  catspostgresscala+ 6

  catspostgresscaladatabasefunctional-programmingtypelevelfs2scodeccats-effect

  Scala

  •

  MIT License

  •177177 forks•1.7k1.7k stars•7878 issues•1616 pull requests•Updated Jul 10, 2026Jul 10, 2026

• otel4s-sdk

  Public
  Implementation of the otel4s SDK modules in Scala from scratch

  typeleveltracingobservability+ 3

  typeleveltracingobservabilitycats-effectopentelemetryotel4s

  Scala

  •

  Apache License 2.0

  •33 forks•66 stars•77 issues•1010 pull requests•Updated Jul 10, 2026Jul 10, 2026

• otel4s

  Public
  An OpenTelemetry library for Scala based on Cats-Effect

  catsscalametrics+ 4

  catsscalametricstypeleveltracingcats-effectopentelemetry

  Scala

  •

  Apache License 2.0

  •5050 forks•212212 stars•66 issues•1010 pull requests•Updated Jul 10, 2026Jul 10, 2026

• log4cats-natchez

  Public
  log4cats backend that provides a Logger[F] given a Trace[F] from Natchez

  loggingtracingnatchez+ 1

  loggingtracingnatchezlog4cats

  Scala

  •

  Apache License 2.0

  •22 forks•11 star•00 issues•99 pull requests•Updated Jul 10, 2026Jul 10, 2026

• log4cats

  Public
  Logging Tools For Interaction with cats-effect

  Scala

  •

  Apache License 2.0

  •7979 forks•416416 stars•1313 issues•1515 pull requests•Updated Jul 10, 2026Jul 10, 2026

• vault

  Public
  Type-safe, persistent storage for values of arbitrary types

  Scala

  •

  MIT License

  •2020 forks•8484 stars•11 issue•11 pull request•Updated Jul 10, 2026Jul 10, 2026

• typelevel.github.com

  Public
  typelevel.org website

  Scala

  •114114 forks•4141 stars•2424 issues•99 pull requests•Updated Jul 10, 2026Jul 10, 2026

• keypool

  Public
  A Keyed Pool Implementation for Scala

  Scala

  •

  MIT License

  •1616 forks•3939 stars•88 issues•77 pull requests•Updated Jul 10, 2026Jul 10, 2026

• vulcan

  Public
  Functional Avro for Scala

  scalaavro

  scalaavro

  Scala

  •

  Apache License 2.0

  •3636 forks•104104 stars•11 issue•99 pull requests•Updated Jul 10, 2026Jul 10, 2026

• fs2-grpc

  Public
  gRPC implementation for FS2/cats-effect

  Scala

  •

  MIT License

  •6565 forks•283283 stars•99 issues•66 pull requests•Updated Jul 10, 2026Jul 10, 2026

• shapeless-3

  Public
  Generic programming for Scala

  Scala

  •2525 forks•201201 stars•55 issues•22 pull requests•Updated Jul 10, 2026Jul 10, 2026

• scalacheck-effect

  Public
  Effectful property testing built on ScalaCheck

  Scala

  •

  Apache License 2.0

  •2626 forks•8282 stars•66 issues•44 pull requests•Updated Jul 10, 2026Jul 10, 2026

• scalacheck

  Public
  Property-based testing for Scala

  scalascalacheckproperty-testing

  scalascalacheckproperty-testing

  Scala

  •

  BSD 3-Clause "New" or "Revised" License

  •396396 forks•2k2k stars•5454 issues•1212 pull requests•Updated Jul 10, 2026Jul 10, 2026

• scalac-options

  Public
  A library for configuring scalac options

  Scala

  •

  Apache License 2.0

  •1818 forks•4848 stars•66 issues•77 pull requests•Updated Jul 10, 2026Jul 10, 2026

• scalac-compat

  Public
  Lightweight tools for tackling Scalac version incompatibilities

  Scala

  •

  Apache License 2.0

  •44 forks•99 stars•00 issues•11 pull request•Updated Jul 10, 2026Jul 10, 2026

• discipline-scalatest

  Public
  ScalaTest binding for Discipline

  Scala

  •

  MIT License

  •1717 forks•2020 stars•11 issue•44 pull requests•Updated Jul 10, 2026Jul 10, 2026

• cats-collections

  Public
  Data structures for pure functional programming in Scala

  Scala

  •

  Other

  •108108 forks•563563 stars•1515 issues•1212 pull requests•Updated Jul 10, 2026Jul 10, 2026

• discipline-munit

  Public
  MUnit binding for Typelevel Discipline

  Scala

  •1616 forks•2525 stars•11 issue•33 pull requests•Updated Jul 10, 2026Jul 10, 2026

• cats-mtl

  Public
  cats transformer type classes.

  catsfunctional-programmingmonad+ 2

  catsfunctional-programmingmonadtypeclassestransformer-typeclasses

  Scala

  •

  Other

  •6666 forks•307307 stars•2121 issues•33 pull requests•Updated Jul 10, 2026Jul 10, 2026

• toolkit

  Public
  Quickstart your next app with the Typelevel Toolkit!

  catsscalatoolkit+ 1

  catsscalatoolkitscala-cli

  Scala

  •

  Apache License 2.0

  •99 forks•100100 stars•88 issues•99 pull requests•Updated Jul 10, 2026Jul 10, 2026

• natchez-http4s

  Public
  Glorious integration layer for Natchez and Http4s.

  Scala

  •

  MIT License

  •1818 forks•5050 stars•44 issues•99 pull requests•Updated Jul 10, 2026Jul 10, 2026

• weaver-test

  Public
  A test framework that runs everything in parallel.

  Scala

  •

  Other

  •1515 forks•8585 stars•2424 issues•99 pull requests•Updated Jul 10, 2026Jul 10, 2026

• twiddles

  Public
  Micro-library for building effectful protocols

  scalatypelevelfp

  scalatypelevelfp

  Scala

  •

  BSD 3-Clause "New" or "Revised" License

  •44 forks•7070 stars•00 issues•88 pull requests•Updated Jul 10, 2026Jul 10, 2026

• spire

  Public
  Powerful new number types and numeric abstractions for Scala.

  Scala

  •

  MIT License

  •238238 forks•1.8k1.8k stars•133133 issues•3131 pull requests•Updated Jul 10, 2026Jul 10, 2026

• simulacrum-scalafix

  Public
  Simulacrum as Scalafix rules

  Scala

  •1010 forks•3636 stars•66 issues•88 pull requests•Updated Jul 10, 2026Jul 10, 2026

• scalacheck-xml

  Public
  Scalacheck instances for scala-xml

  Scala

  •11 fork•55 stars•00 issues•44 pull requests•Updated Jul 10, 2026Jul 10, 2026

• sbt-typelevel

  Public
  Let sbt work for you.

  scalasbttypelevel+ 1

  scalasbttypelevelsbt-plugin

  Scala

  •

  Apache License 2.0

  •5858 forks•184184 stars•6767 issues•2222 pull requests•Updated Jul 10, 2026Jul 10, 2026

• sbt-tpolecat

  Public
  scalac options for the enlightened

  scalasbtsbt-plugin+ 1

  scalasbtsbt-plugincompiler-options

  Scala

  •

  Apache License 2.0

  •5757 forks•410410 stars•1212 issues•55 pull requests•Updated Jul 10, 2026Jul 10, 2026

• paiges

  Public
  an implementation of Wadler's a prettier printer

  scalalayoutpretty-print

  scalalayoutpretty-print

  Scala

  •

  Apache License 2.0

  •3131 forks•188188 stars•44 issues•1515 pull requests•Updated Jul 10, 2026Jul 10, 2026