Apache Spark - A unified analytics engine for large-scale data processing

Scala 2 compiler and standard library. Scala 2 bugs at https://github.com/scala/bug; Scala 3 at https://github.com/scala/scala3

The Community Maintained High Velocity Web Framework For Java and Scala.

A Git platform powered by Scala with easy installation, high extensibility & GitHub API compatibility

A fault tolerant, protocol-agnostic RPC system

The Guardian DotCom.

Lightweight, modular, and extensible library for functional programming.

sbt, the interactive build tool

A machine learning package built for humans.

Scala.js, the Scala to JavaScript compiler

Principled Functional Programming in Scala

Fault tolerant job scheduler for Mesos which handles dependencies and ISO8601 based schedules

Deploy and manage containers (including Docker) on top of Apache Mesos at scale.

Find potential bugs in your services with Diffy

In-memory dimensional time series database.

Wonderful reusable code from Twitter

A better build tool for Java, Scala and Kotlin: Simpler than Maven, easier than Gradle, with 3-6x faster dev workflows than other JVM build tools

Tiny Scala high-performance, async web framework, inspired by Sinatra

Scala Scripting

A minimal, idiomatic Scala interface for HTTP

A suite of scala libraries for building and consuming RESTful web services on top of Akka: lightweight, asynchronous, non-blocking, actor-based, testable

Fast, testable, Scala services built on TwitterServer and Finagle

Deploy über-JARs. Restart processes. (port of codahale/assembly-sbt)

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

sbt Native Packager

Scala combinator library for building Finagle HTTP services

Twitter-Server defines a template from which services at Twitter are built

JSON library

Purely Functional Algorithms and Data Structures in Scala

Simple, safe and intuitive Scala I/O