AstroCocoaKit is a OSX (and soon-iOS) Framework written in Objective-C to handle some basic and less basic calculations of astronomical interest. It replaces the obsolete AstroCocoaPackage.
The kit is used to develop the new (> 1.3) version of iObserve.app (web, app stores: mac, ios).
In code comments, "AA" refers to Jean Meeus' Astronomical Algorithms textbook.
Even if not always correct in their headers, the Licence of this kit applies in every KPC files.