Mac OS X application which implements modems (modulator-demodulators) for some of the Amateur Radio modulation modes....
"BasicCocoaAnimations" demonstrates the use of the animator proxy.
CocoaDragAndDrop - demonstrates how to implement drag and drop functionality.
Wraps aspects of Cocoa frameworks with the declarative ReactiveSwift primitives.
ChromaCocoa will show reading time on a clock can be fun and very pleasant at the same time.