OSXS Reference Stuff
OS X Reference Materials
Cocoa Literature List
A convenient way to keep track of the ever-growing list of fine articles out there on how to become a great Cocoa programmer.
Although there are many languages to program in, it's good to know the languages with which one compiles a GUI application in OS X.
A searchable list of random information that was worth keeping somewhere on the net. You can add to the mess or just browse what others have added.