scalaz/scalaz

Principled Functional Programming in Scala

softwaremill/sttp

The Scala HTTP client you always wanted!

argonaut-io/argonaut

Purely functional JSON parser and library in scala.

mockito/mockito-scala

Mockito for Scala language

scalaprops/scalaprops

property based testing library for Scala

thoughtworksinc/each

A macro library that converts native imperative syntax to scalaz's monadic expressions

clevercloud/pulsar4s

Idiomatic, typesafe, and reactive Scala client for Apache Pulsar

djspiewak/shims

Seamless interop layer between cats and scalaz

krzemin/octopus

Scala library for boilerplate-free validation

japgolly/test-state

Scala Test-State.

thangiee/freasy-monad

Easy way to create Free Monad using Scala macros with first-class Intellij support.

lloydmeta/diesel

Boilerplate-free, zero-overhead Tagless Final / typed-final / Finally Tagless DSLs in Scala

scalaz/testz

The pure testing library by scalaz.

verizon/delorean

Convert Task to Future, and Future to Task

xuwei-k/httpz

purely functional http client with scalaz.Free

scalaz/scalaz-deriving

Principled, fast, typeclass derivation.

msgpack4z/msgpack4z-core

typeclass based functional msgpack serializer/deserializer for Scala. support scala.js and scala-native / msgpack.org[Scala]

hablapps/puretest

Purely functional testing in Scala

thoughtworksinc/tryt.scala

Monad transformers for exception handling