- TTTAttributedLabel/TTTAttributedLabel 6,317 A drop-in replacement for UILabel that supports attributes, data detectors, links, and more
- twitter/twui 2,737 A UI framework for Mac based on Core Animation
- BigZaphod/Chameleon 2,431 Chameleon is a port of Apple's UIKit for iOS (and some minimal related frameworks) to Mac OS X.
- mattgemmell/MGSplitViewController 1,540 A flexible, advanced split-view controller for iPad developers.
- klazuka/Kal 1,303 A calendar component for the iPhone (the UI is designed to match MobileCal)