sksamuel/elastic4s

Elasticsearch Scala Client - Reactive, Non Blocking, Type Safe, HTTP Client

estatico/scala-newtype

NewTypes for Scala with no runtime overhead

sangria-graphql/sangria

Scala GraphQL implementation

circe/circe-optics

Monocle lenses and other tools for working with JSON values

com-lihaoyi/requests-scala

A Scala port of the popular Python Requests HTTP client: flexible, intuitive, and straightforward to use.

reactivex/rxscala

RxScala – Reactive Extensions for Scala – a library for composing asynchronous and event-based programs using observable sequences

sirthias/parboiled2

A macro-based PEG parser generator for Scala 2.10+

scalikejdbc/scalikejdbc

A tidy SQL-based DB access library for Scala developers. This library naturally wraps JDBC APIs and provides you easy-to-use APIs.

twitter/bijection

Reversible conversions between types

akka/alpakka

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

scalatest/scalatestplus-junit

ScalaTest + JUnit provides integration support between ScalaTest and JUnit.

playframework/play-ws

Standalone Play WS, an async HTTP client with fluent API

dnvriend/akka-persistence-inmemory

Akka-persistence-inmemory is a plugin for akka-persistence that stores journal and snapshot messages memory, which is very useful when testing persistent actors, persistent FSM and akka cluster

zio/zio-prelude

A lightweight, distinctly Scala take on functional abstractions, with tight ZIO integration

typelevel/cats-tagless

Library of utilities for tagless final encoded algebras

zio/zio-config

Easily use and document any config from anywhere in ZIO apps

typelevel/scalacheck-effect

Effectful property testing built on ScalaCheck

scala/scala-swing

Scala wrappers for Java's Swing API for desktop GUIs

tpolecat/natchez

functional tracing for cats