Apple

The Swift Programming Language

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

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

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

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

Converter tools for Core ML.

Turi Create simplifies the development of custom machine learning models.

Swift Community-Hosted Continuous Integration

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

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

Plugin and runtime library for using protobuf with Swift

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

Official CUPS Sources

The Calendar and Contacts Server.

Useful code around SwiftNIO.

Bindings to OpenSSL-compatible libraries for TLS support in SwiftNIO

HTTP/2 support for SwiftNIO

The Darwin Kernel (mirror)

Python iCalendar library used by CalendarServer

Example package for use with the Swift Package Manager

Example package for use with the Swift Package Manager