AppKiDo for Mac

From Andy Lee:

AppKiDo helps Mac programmers browse Cocoa documentation. With AppKiDo, you can:

• Browse the Cocoa class hierarchy.
• Look up a class in one of several predefined lists ("NSView classes," "Classes with delegates," etc.).
• Search for all class, protocol, method, notification, and function names with a given substring.
• Quickly see all methods implemented by a class, including methods inherited from superclasses and methods declared in protocols (but not including undocumented methods).
• Open the .h file for any Cocoa class (rarely needed, but sometimes handy).