AppKiDo and AppKiDo-for-iPhone

AppKiDo presents the class hierarchy in a browser view. You can see sibling classes at a glance and go up and down the hierarchy with a single click. This is convenient because the method you're looking for is often in a superclass.

If you are new to Cocoa, browse the class hierarchy to get acquainted with what's there and how it's organized. If you are more experienced, you can explore branches of the hierarchy you never paid attention to before.

AppKiDo can display a consolidated list of all methods a class implements, including inherited methods, methods that satisfy a protocol, and methods added by a framework other than the class's main framework (for example, the drawing methods that AppKit adds to NSAttributedString). This can help you understand the complete behavior of a class, and it's another quick way to find methods that are in a superclass.

AppKiDo provides handy "quicklists" of logically related groups of classes. This puts manyfrequently used classes a click or two away. It can also help you understand some concepts. For example, if you find delegates confusing, it may help to browse "Classes with delegates" to see all the ways a delegate is used.

If you're not sure what you're looking for, AppKiDo can search for names of API constructs. For example, if you're wondering how to manage cursors, search for "cursor". Apple has conveniently put the word "cursor" in the names of most things related to cursors.

AppKiDo can open the header file for any Cocoa class. Sometimes there is useful information in the headers that is not available in the documentation.