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.

getquill/quill

Compile-time Language Integrated Queries for Scala

frees-io/freestyle

A cohesive & pragmatic framework of FP centric Scala libraries

akka/akka-persistence-cassandra

A replicated Akka Persistence journal backed by Apache Cassandra

dispatch/reboot

Scala wrapper for the Java AsyncHttpClient.

playframework/play-json

The Play JSON library

outr/scribe

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

propensive/contextual

Contextual

iheartradio/ficus

Scala-friendly companion to Typesafe config

ktoso/sbt-jmh

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

sciss/scalacollider

A Scala sound synthesis library based on SuperCollider

frees-io/iota

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

tumblr/colossus

I/O and Microservice library 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.

scala-exercises/scala-exercises

The easy way to learn Scala.

julienrf/play-json-derived-codecs

outr/reactify

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

scala/pickling

Fast, customizable, boilerplate-free pickling support for Scala