scalaz/scalaz

Principled Functional Programming in Scala

lloydmeta/enumeratum

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

scodec/scodec

Scala combinator library for working with binary data

estatico/scala-newtype

NewTypes for Scala with no runtime overhead

47degrees/sbt-microsites

An sbt plugin to create awesome microsites for your project

playframework/play-json

The Play JSON library

typelevel/mouse

A small companion to cats

typelevel/paiges

an implementation of Wadler's a prettier printer

cb372/cats-retry

bitcoin-s/bitcoin-s

Bitcoin Implementation in Scala

valskalla/odin

Fast & Functional logger in Scala

comcast/ip4s

Defines immutable, safe data structures for describing IP addresses, multicast joins, socket addresses and similar IP & network related data types

swissborg/lithium

Lithium - A split-brain resolver for Akka-Cluster

circe/circe-fs2

Streaming JSON parsing and decoding with fs2

circe/circe-config

Yet another Typesafe config Scala wrapper powered by circe

failurewall/failurewall

Destroys failures.

laserdisc-io/laserdisc

A Future-free Fs2 native pure FP Redis client

sloshy/fs2-es

Event sourcing utilities for FS2

davegurnell/checklist

Validation library for Scala.

dvreeze/yaidom

Yet another immutable XML DOM-like API