1. PrecalcThis repo contains some code which can graph equations in a UIView.
5. MbcalendarkitAn open source calendar framework for iOS, with support for customization, IBDesignable, Autolayout, and more.
6. SurfboardSurfboard is a delightful onboarding framework for iOS.
8. MbtileparserMBTileParser is a game engine written using pure UIKit in the days before SpriteKit.
10. KosherCocoaMy Objective-C port of KosherJava. KosherCocoa enables you to perform sunrise-based and sunset-based calculations for Jewish prayer and calendar.
11. FilterBarA marriage of UINavigationBar and UISegmentedControl.