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

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

A minimal, idiomatic Scala interface for HTTP

Refinement types for Scala

Scala library for managing immutable application model

Productivity-oriented collection of lightweight fancy stuff for Scala toolchain

Automatically generated diagrams and animations for Scala data structures

Fun.CQRS is a Scala CQRS/ES framework. It provides the basic blocks to build event driven aggregates with Event Sourcing.

Beautiful trees, without the landscaping.

Scala Serverless Microframework for AWS Lambda, inspired by Amazon's Chalice (https://github.com/awslabs/chalice)

An exploration of purely functional library design in Scala.

macro for summoning implicit values

Type safe delta

Efficient immutable interval sets

Type class based library to read / write XML

Data structure experimentation in scala

s_mach.datadiff is an open-source data difference engine for Scala. Implementations of the DataDiff type-class are provided which can compute the difference between all data types, Option, Set, Seq…

Balanced tree based IndexedSeq implementation for Scala