Hex Fiend is an open source hex editor for Mac OS X, written using Apple's Cocoa frameworks in Objective-C. This wiki is to document the design of Hex Fiend for those who want to modify it. Because Hex Fiend makes heavy use of the Cocoa framework, developers should be familiar with Cocoa, which is documented at http://developer.apple.com/cocoa/.
See the links on the sidebar to the left for additional places to get started. Editing is currently disabled until I determine the best way to control spam.