Stars
Three20 is an Objective-C library for iPhone developers
Methods to allow using HTML code with CoreText
Easy to use CFNetwork wrapper for HTTP requests, Objective-C, Mac OS X and iPhone
Cocos2d for iOS and OS X, built using Objective-C
tap + haiku = tapku, a well crafted open source iOS framework
Chameleon is a port of Apple's UIKit for iOS (and some minimal related frameworks) to Mac OS X.
Open source code for the idevrecipes.com blog
A grid view for iPhone/iPad, designed to look similar to NSCollectionView.
Drop in sharing features for all iPhone and iPad apps
Open source release of Canabalt for iOS
Add functionality to UIDevice to distinguish between platforms like iPod touch 1G and 2G and iPhone
A calendar component for the iPhone (the UI is designed to match MobileCal)
Objective-C Twitter integration library for Mac OS X and iPhone. Official repository.
A UIButton subclass that works with for non-rectangular button shapes.
Useful UIImage categories for iPhone/iPad developers.
A humane JSON Objective-C un-framework. (TouchJSON has been deprecated - see README)
A collection of helpers (categories) we've written for iOS and OS X, full with convenience methods to make them easier and more useful. [tags:cocoa,objective-c,ios,mac]
TextMate plugin (Cocoa) shell for running 'ack'
A category to extend Cocoa's NSDate class with some convenience functions.
DEPRECATED, this isn't supported anymore. A two-dimensional scrolling view component for the iPhone, heavily inspired by UITableView.
Sudoku solver with OCR capability on iOS (edit: developed for iOS 4 before ARC, some memory reference changes may be required to get the app to make a full run.)
An iPhone (or iPod touch) port of the popular old QBasic game with spunk!
Mobile ITC Reports Downloader and Dashboard
UIControl for iOS that acts like a rotary knob
This project is now deprecated.