Repositories list

• vulcan

  Public
  Functional Avro for Scala

  scalaavro

  scalaavro

  Scala

  •

  Apache License 2.0

  •3535 forks•104104 stars•00 issues•00 pull requests•Updated May 17, 2026May 17, 2026

• grackle

  Public
  Grackle: Functional GraphQL for the Typelevel stack

  Scala

  •

  Apache License 2.0

  •3131 forks•187187 stars•2323 issues•33 pull requests•Updated May 17, 2026May 17, 2026

• otel4s-sdk

  Public
  Implementation of the otel4s SDK modules in Scala from scratch

  typeleveltracingobservability+ 3

  typeleveltracingobservabilitycats-effectopentelemetryotel4s

  Scala

  •

  Apache License 2.0

  •22 forks•55 stars•66 issues•00 pull requests•Updated May 17, 2026May 17, 2026

• cats-tagless

  Public
  Library of utilities for tagless final encoded algebras

  scalafunctional-programmingtagless

  scalafunctional-programmingtagless

  Scala

  •

  Apache License 2.0

  •4141 forks•320320 stars•99 issues•22 pull requests•Updated May 17, 2026May 17, 2026

• kittens

  Public
  Automatic type class derivation for Cats

  Scala

  •

  Apache License 2.0

  •6767 forks•545545 stars•77 issues•22 pull requests•Updated May 17, 2026May 17, 2026

• shapeless-3

  Public
  Generic programming for Scala

  Scala

  •2525 forks•202202 stars•55 issues•00 pull requests•Updated May 17, 2026May 17, 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 May 16, 2026May 16, 2026

• munit-cats-effect

  Public
  Integration library for MUnit & cats-effect

  Scala

  •

  Apache License 2.0

  •3838 forks•157157 stars•44 issues•22 pull requests•Updated May 16, 2026May 16, 2026

• typelevel-nix

  Public
  Development tools for Typelevel projects

  scalanixscalajs+ 2

  scalanixscalajsflakesdevshell

  Nix

  •

  Apache License 2.0

  •1010 forks•127127 stars•44 issues•22 pull requests•Updated May 15, 2026May 15, 2026

• fs2-kafka

  Public
  Functional Kafka Streams for Scala

  streamingscalafs2+ 1

  streamingscalafs2kafka-client

  Scala

  •

  Apache License 2.0

  •108108 forks•312312 stars•00 issues•00 pull requests•Updated May 15, 2026May 15, 2026

• toolkit

  Public
  Quickstart your next app with the Typelevel Toolkit!

  catsscalatoolkit+ 1

  catsscalatoolkitscala-cli

  Scala

  •

  Apache License 2.0

  •99 forks•9898 stars•88 issues•11 pull request•Updated May 15, 2026May 15, 2026

• weaver-test

  Public
  A test framework that runs everything in parallel.

  Scala

  •

  Other

  •1515 forks•8383 stars•2525 issues•99 pull requests•Updated May 14, 2026May 14, 2026

• otel4s

  Public
  An OpenTelemetry library for Scala based on Cats-Effect

  catsscalametrics+ 4

  catsscalametricstypeleveltracingcats-effectopentelemetry

  Scala

  •

  Apache License 2.0

  •4949 forks•209209 stars•55 issues•33 pull requests•Updated May 14, 2026May 14, 2026

• skunk

  Public
  A data access library for Scala + Postgres.

  catspostgresscala+ 6

  catspostgresscaladatabasefunctional-programmingtypelevelfs2scodeccats-effect

  Scala

  •

  MIT License

  •172172 forks•1.7k1.7k stars•7878 issues•1111 pull requests•Updated May 13, 2026May 13, 2026

• natchez

  Public
  functional tracing for cats

  catsscalatracing+ 4

  catsscalatracingopentracinghoneycombjaegercats-effect

  Scala

  •

  MIT License

  •7979 forks•339339 stars•1616 issues•88 pull requests•Updated May 12, 2026May 12, 2026

• natchez-http4s

  Public
  Glorious integration layer for Natchez and Http4s.

  Scala

  •

  MIT License

  •1818 forks•5050 stars•44 issues•66 pull requests•Updated May 12, 2026May 12, 2026

• case-insensitive

  Public
  A case-insensitive string for Scala

  catsscalastring+ 1

  catsscalastringcase-insensitive

  Scala

  •

  Apache License 2.0

  •1515 forks•3838 stars•55 issues•22 pull requests•Updated May 12, 2026May 12, 2026

• jawn

  Public
  Jawn is for parsing jay-sawn (JSON)

  jsonscala

  jsonscala

  Scala

  •7373 forks•436436 stars•1212 issues•22 pull requests•Updated May 12, 2026May 12, 2026

• jawn-fs2

  Public
  Integration between jawn and fs2

  Scala

  •

  Other

  •1818 forks•3939 stars•11 issue•22 pull requests•Updated May 12, 2026May 12, 2026

• scalacheck-xml

  Public
  Scalacheck instances for scala-xml

  Scala

  •11 fork•55 stars•00 issues•11 pull request•Updated May 12, 2026May 12, 2026

• vault

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

  Scala

  •

  MIT License

  •2020 forks•8484 stars•11 issue•00 pull requests•Updated May 12, 2026May 12, 2026

• idna4s

  Public
  Cross-platform Scala implementation of Internationalized Domain Names in Applications

  Scala

  •

  MIT License

  •44 forks•77 stars•55 issues•22 pull requests•Updated May 12, 2026May 12, 2026

• fs2-grpc

  Public
  gRPC implementation for FS2/cats-effect

  Scala

  •

  MIT License

  •6565 forks•283283 stars•88 issues•66 pull requests•Updated May 12, 2026May 12, 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•77 pull requests•Updated May 12, 2026May 12, 2026

• squants

  Public
  The Scala API for Quantities, Units of Measure and Dimensional Analysis

  Scala

  •

  Apache License 2.0

  •122122 forks•931931 stars•4343 issues•2121 pull requests•Updated May 12, 2026May 12, 2026

• doobie

  Public
  Functional JDBC layer for Scala.

  scaladatabasefunctional-programming+ 3

  scaladatabasefunctional-programmingjdbctypelevelfp

  Scala

  •

  MIT License

  •376376 forks•2.2k2.2k stars•127127 issues•1414 pull requests•Updated May 11, 2026May 11, 2026

• otel4s-experimental

  Public
  A companion project for exploring experimental features in otel4s

  typelevelcats-effectopentelemetry+ 1

  typelevelcats-effectopentelemetryotel4s

  Scala

  •

  Apache License 2.0

  •33 forks•88 stars•11 issue•00 pull requests•Updated May 11, 2026May 11, 2026

• kind-projector

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

  Scala

  •

  MIT License

  •7575 forks•925925 stars•1010 issues•00 pull requests•Updated May 11, 2026May 11, 2026

• foundation

  Public
  governance for the Typelevel Foundation

  11 fork•00 stars•33 issues•00 pull requests•Updated May 11, 2026May 11, 2026

• typelevel.github.com

  Public
  typelevel.org website

  Scala

  •112112 forks•4141 stars•2424 issues•88 pull requests•Updated May 11, 2026May 11, 2026