Von dem Entwickler von Quinn:

animation toolbox: Three Objective-C classes to easily and quickly build visual animations in Cocoa. Includes a sample project for Project Builder/Interface Builder. [...] It takes very little code to create an animation, and it's easy to change things. The classes can be used for quite different kinds of animations, and I have worked with them for several months now so they should run quite reliable. Included is a short description of the classes, and there are many comments in the code.

Nett!