Apple

The Swift Programming Language

The libdispatch Project, (a.k.a. Grand Central Dispatch), for concurrency on multicore hardware

This is the version of LLDB that supports the Swift programming language & REPL.

Event-driven network application framework for high performance protocol servers & clients, non-blocking.

FoundationDB - the open source, distributed, transactional key-value store

Logging and communication to allow Swift toolchains to communicate with Xcode.

Automated tests for validating the generated Swift snapshots behave correctly

The Foundation Project, providing core utilities, internationalization, and OS independence

The XCTest Project, A Swift core library for providing unit test support

The Package Manager for the Swift Programming Language

A low-level build system, used by Xcode and the Swift Package Manager

The infrastructure and project index comprising the Swift source compatibility suite.

This maintains proposals for changes and user-visible enhancements to the Swift Programming Language.

Converter tools for Core ML.

SwiftPM package for SwiftSyntax library.

Official CUPS Sources

Turi Create simplifies the development of custom machine learning models.

Plugin and runtime library for using protobuf with Swift

Useful code around SwiftNIO.

Extensions for SwiftNIO to support Apple platforms as first-class citizens.

Stress testing utilities for Swift's tooling

The Calendar and Contacts Server.

Bindings to OpenSSL-compatible libraries for TLS support in SwiftNIO

examples of how to use swift-nio

Swift Community-Hosted Continuous Integration