scalaz/scalaz

Principled Functional Programming in Scala

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

julien-truffaut/monocle

Optics library for Scala

lift/framework

Lift Framework

typelevel/discipline

Flexible law checking for Scala

slamdata/matryoshka

Generalized recursion schemes and traversals for Scala.

iheartradio/ficus

Scala-friendly companion to Typesafe config

atnos-org/eff

Eff monad for cats - http://atnos-org.github.io/eff

christopherdavenport/log4cats

Logging Tools For Interaction with cats-effect

ngs-doo/dsl-json

High performance JVM JSON library

typelevel/scalaz-specs2

Specs2 bindings for Scalaz

eed3si9n/sjson-new

a typeclass based JSON codec that's backend independent

sbt/sbt-js-engine

Support for sbt plugins that use JavaScript

slamdata/scala-pathy

A type-safe abstraction for platform-independent file system paths.

atnos-org/origami

Monadic folds

systemfw/upperbound

A purely functional rate limiter

typelevel/catalysts

mdedetrich/scalajson

ScalaJSON - JSON for Scala, currently contains minimal AST

christopherdavenport/epimetheus

An Afterthought of Prometheus

http4s/http4s-websocket

Common websocket support for blaze and http4s-servlet