Apple

The Swift Programming Language

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

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

The Package Manager for the Swift Programming Language

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

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

SwiftPM package for SwiftSyntax library.

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

Automated tests for validating the generated Swift snapshots behave correctly

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

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

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

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

Converter tools for Core ML.

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

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

Bindings to OpenSSL-compatible libraries for TLS support in SwiftNIO

Official CUPS Sources

Turi Create simplifies the development of custom machine learning models.

The Calendar and Contacts Server.

The Darwin Kernel (mirror)

Plugin and runtime library for using protobuf with Swift

Useful code around SwiftNIO.

HTTP/2 support for SwiftNIO

Swift Community-Hosted Continuous Integration