Scala

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

♞ lichess.org: the forever free, adless and open source chess server ♞

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

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

PredictionIO, a machine learning server for developers and ML engineers.

CMAK is a tool for managing Apache Kafka clusters

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

A fault tolerant, protocol-agnostic RPC system

Modern Load Testing as Code

The Scala 3 compiler, also known as Dotty.

Simple and Distributed Machine Learning

sbt, the interactive build tool

Principled Functional Programming in Scala

Scala.js, the Scala to JavaScript compiler

Your favorite language gets closer to bare metal.

Chisel: A Modern Hardware Design Language

ZIO — A type-safe, composable library for async and concurrent programming in Scala

TheHive: a Scalable, Open Source and Free Security Incident Response Platform

Rocket Chip Generator

Deequ is a library built on top of Apache Spark for defining "unit tests for data", which measure data quality in large datasets.