The Scala programming language
A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable
Distributed Tracing, Metrics and Context Propagation for application running on the JVM
Scala extensions for the Kryo serialization library
Deeplearning4j, ND4J, DataVec and more - deep learning & linear algebra for Java/Scala with GPUs + Spark - From Skymind
uPickle: a simple, fast, dependency-free JSON serialization library for Scala
ScalaTags is a small XML/HTML construction library for Scala.
Lightweight and Nonintrusive Scala Dependency Injection Library
Async Scala-Akka-Netty based Load Test Tool
A cohesive & pragmatic framework of FP centric Scala libraries
Non-blocking, Reactive Redis driver for Scala (with Sentinel support)
Library for building sbt plugins for the web
The Scala HTTP client you always wanted!
A library that provides an in-memory Kafka instance to run your tests against.
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
Message queueing system with an actor-based Scala and Amazon SQS-compatible interfaces. Runs stand-alone or embedded.
I/O and Microservice library for Scala
Akka HTTP now includes Akka SSE, this project is at EOL
:microphone: Micro Web framework to build Servlet applications in Scala, the core part of Skinny Framework 2
Alpakka Kafka connector - Alpakka is a Reactive Enterprise Integration library for Java and Scala, based on Reactive Streams and Akka.