The official Mac SDK for the HockeyApp service. It contains a crash reporter that checks at startup whether your application crashed last time it was launched, then offers to send that information to the HockeyApp service. It supports Mac OS X >= 10.5, Intel architectures and also the Mac Sandbox.
NSKeyedArchiver/Unarchiver composition that outputs portable serialized plists. Specifically written for MindNode. To as losslessly as possible bring NSAttributedStrings from iOS to the Mac and vice versa.