Audio server that can play to AirPlay 1+2 speakers (multiroom), Chromecast and locally. Supports Spotify, internet radio and many file formats. Also MPD server, iTunes DAAP, smart playlists, Apple …

libmypaint, a.k.a. "brushlib", is a library for making brushstrokes which is used by MyPaint and other projects.

Swift implementation of HSLuv (revision 4)

Vector to Raster Map Conflation

Replacement for Apple's Reachability re-written in Swift with closures

Network abstraction layer written in Swift.

Build Time Analyzer for Swift

A cross-platform chess library for Swift

SwiftChallenges

Particle system that's both calculated and rendered on the GPU using the Metal framework

Data Parallel Processing with Swift and Metal on GPU for iOS8 (and beyond)

[Probably deprecated] Swift 2/3 JSON unmarshalling done (more) right

Magical Data Modeling Framework for JSON - allows rapid creation of smart data models. You can use it in your iOS, macOS, watchOS and tvOS apps.

Cocoa framework and Obj-C dynamism bindings for ReactiveSwift.

Xcode plugin to collect and list the `TODO`,`FIXME`,`???`,`!!!!`

Human-friendly HSL, website and math