IPhrasr is a project mainly written in OBJECTIVE-C and C, it's free.
Keyboard Shortcuts:
CMD+SHIFT+? Help Alt+Doppelklick Quick Help Alt+CMD+Pfeil oben Switch Header/Impl (oder drei Finger) CMD+Shift+D Open Quickly ALT+CMD+Links/Rechts File History CTRL+I Auto-Indentieren CMD+Doppelklick auf Methode Reinspringen
Cocoa:
Klassenbibliothek Objective-C-Framework von Apple
NS-Klassen: Basis-Klassen UI-Klassen: iPhone-SDK
MK (Mapkit), CA (CoreAnimation)