The Swift Programming Language

Open-source implementation of a substantial portion of the API of Apple CryptoKit suitable for use on Linux platforms.

Subprocess is a cross-platform package for spawning processes in Swift.

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

Swift compiler driver reimplementation in Swift

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

The Foundation project

Bazel rules to build Swift on Apple and Linux platforms

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

The Package Manager for the Swift Programming Language

A high-level build system based on llbuild, used by Xcode, Swift Playground, and the Swift Package Manager

Copy of Sqlite for use by clients within the Swift toolchain. This is not a general-purpose wrapper for Sqlite.

Contains common infrastructural code for both SwiftPM and llbuild.

Language Server Protocol implementation for Swift and C-based languages

Straightforward, type-safe argument parsing for Swift

Automated tests for validating the generated Swift snapshots behave correctly

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