Matt Legend Gemmel, the Apple-Man
Open source backer
Matt Legend Gemmell is a very productive developer for Mac OS Cocoa and iPhone/iPad applications. He created instinctivecode, a community for Cocoa and iPhone/iPad application development. Matt is a firm open source backer, who has opened many his codes. The codes also have been used by over 60 applications.
Among numerous nice open source Cocoa and iPhone/iPad applications from him, iPad Multi-Touch is perhaps the most interesting one, also with very simple and easy to follow source codes. With this open app, you can experience how amazing the multiple touch functions the iPad can support.