IOS Universal Framework - Xcode template that adds iOS static framework support: https://github.com/kstenerud/iOS-Universal-Framework
KSJSON - World's fastest JSON library for iOS: https://github.com/kstenerud/KSJSON
Objective Gems - Ongoing iOS programmer's toolbox: https://github.com/kstenerud/Objective-Gems
And a couple of stealth projects that I'm not ready to reveal yet.