typelevel/cats

Lightweight, modular, and extensible library for functional programming.

julien-truffaut/monocle

Optics library for Scala

lloydmeta/enumeratum

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

akka/akka-persistence-cassandra

A replicated Akka Persistence journal backed by Apache Cassandra

dispatch/reboot

Scala wrapper for the Java AsyncHttpClient.

frees-io/freestyle

A cohesive & pragmatic framework of FP centric Scala libraries

outr/scribe

Practical logging framework that doesn't require any other logging framework and can be completely configured programmatically.

iheartradio/ficus

Scala-friendly companion to Typesafe config

propensive/magnolia

Simple, fast, debuggable generic derivation for typeclasses

ktoso/sbt-jmh

"Trust no one, bench everything." - sbt plugin for JMH (Java Microbenchmark Harness)

propensive/contextual

Contextual

tumblr/colossus

I/O and Microservice library for Scala

scalacenter/bloop

Scala build server and command-line tool for fast developer workflows

sciss/scalacollider

A Scala sound synthesis library based on SuperCollider

frees-io/iota

Fast [co]product types with a clean syntax. For Cats & Scalaz.

julienrf/play-json-derived-codecs

outr/reactify

The first and only true Functional Reactive Programming framework for Scala.

akka/reactive-kafka

Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.

kailuowang/henkan

A small library for converting between case classes.

akka/akka-stream-contrib

Add-ons to Akka Stream