Below are links to code or articles I’ve either used, considered using, or just find interesting. This is not material I’ve produced and I make no claims to it, nor can I offer any support.
Swift LineChart – Line Chart library for iOS
Jot – easily add drawings and text to images (iOS)
Swack – Basic VM in Swift
SwiftObserverSet – Mike Ash’s reimagining of NSNotification in Swift
Async – Swift for async dispatches in Grand Central Dispatch