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

A platform to build and run apps that are elastic, agile, and resilient. SDK, libraries, and hosted environments.

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

A fault tolerant, protocol-agnostic RPC system

An open-source storage framework that enables building a Lakehouse architecture with compute engines including Spark, PrestoDB, Flink, Trino, and Hive and APIs

Lightweight, modular, and extensible library for functional programming.

sbt, the interactive build tool

Scala.js, the Scala to JavaScript compiler

Principled Functional Programming in Scala

Your favorite language gets closer to bare metal.

Slick (Scala Language Integrated Connection Kit) is a modern database query and access library for Scala

A minimal, idiomatic Scala interface for HTTP

Compositional, streaming I/O library for Scala

Functional JDBC layer for Scala.

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

Facebook's React on Scala.JS

A Scala kernel for Jupyter

Reactive data-binding for Scala

Build highly concurrent, distributed, and resilient message-driven applications using Java/Scala

Akka Streams & Akka HTTP for Large-Scale Production Deployments

The Streaming-first HTTP server/module of Akka

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

A JVM written in Scala

Livy is an open source REST interface for interacting with Apache Spark from anywhere

A lightweight, clean and simple JSON implementation in Scala

Refactoring and linting tool for Scala

Toolkit for Scala Development

simple combinator-based parsing for Scala. formerly part of the Scala standard library, now a separate community-maintained module

Data structures for pure functional programming in Scala