scala/scala-xml

The standard Scala XML library

typelevel/fs2

Compositional, streaming I/O library for Scala

scoverage/scalac-scoverage-plugin

Scoverage Scala Code Coverage Core Libs

scala-native/scala-native

Your favorite language gets closer to bare metal.

http4s/http4s

A minimal, idiomatic Scala interface for HTTP

playframework/twirl

Twirl is Play's default template engine

lightbend/config

configuration library for JVM languages using HOCON files

scalaz/scalaz

Principled Functional Programming in Scala

scala/scala-parser-combinators

simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module

spray/spray

A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable

zio/zio

ZIO — A type-safe, composable library for async and concurrent programming in Scala

paulbutcher/scalamock

Native Scala mocking framework

scalatest/scalatestplus-scalacheck

ScalaTest + ScalaCheck provides integration support between ScalaTest and ScalaCheck.

fasterxml/jackson-module-scala

Add-on module for Jackson (https://github.com/FasterXML/jackson) to support Scala-specific datatypes

com-lihaoyi/utest

A simple testing framework for Scala

typelevel/munit-cats-effect

Integration library for MUnit & cats-effect

scopt/scopt

command line options parsing for Scala

lloydmeta/enumeratum

A type-safe, reflection-free, powerful enumeration implementation for Scala with exhaustive pattern match warnings and helpful integrations.

scalapb/scalapb

Protocol buffer compiler for Scala.

monix/monix

Asynchronous, Reactive Programming for Scala and Scala.js.