scala/scala

Scala 2 compiler and standard library. Bugs at https://github.com/scala/bug; Scala 3 at https://github.com/lampepfl/dotty

scalatest/scalatest

A testing tool for Scala and Java developers

scala-js/scala-js

Scala.js, the Scala to JavaScript compiler

lampepfl/dotty

The Scala 3 compiler, also known as Dotty.

akka/akka

Build highly concurrent, distributed, and resilient message-driven applications on the JVM

typelevel/scalacheck

Property-based testing for Scala

scala-js/scala-js-dom

Statically typed DOM API for Scala.js

typelevel/cats

Lightweight, modular, and extensible library for functional programming.

etorreborre/specs2

Software Specifications for Scala

circe/circe

Yet another JSON library for Scala

playframework/playframework

The Community Maintained High Velocity Web Framework For Java and Scala.

typelevel/cats-effect

The pure asynchronous runtime for Scala

lightbend-labs/scala-logging

Convenient and performant logging library for Scala wrapping SLF4J.

apache/spark

Apache Spark - A unified analytics engine for large-scale data processing

milessabin/shapeless

Generic programming for Scala

scalameta/munit

Scala testing library with actionable errors and extensible APIs

akka/akka-http

The Streaming-first HTTP server/module of Akka

scala/scala-collection-compat

makes some Scala 2.13 APIs (primarily collections, also some others) available on 2.11 and 2.12, to aid cross-building

playframework/play-json

The Play JSON library

json4s/json4s

JSON library