iOS open source
A radio button with a pretty animation.
iOS 7 style Passcode Lock.
Simple to use month & year picker view.
This blog: written in Swift, formerly in Node.js, and Sinatra (unmaintained).
Unused.rb. Find and delete unused assets in your Xcode project.
Lines-Of-Code.rb. Count the lines of code in your Xcode project (or in any folder, actually).