Support framework used by iPhone projects such as WinterBoard, Dock2, and Five Icon Dock.

The general idea is that there are a number of reasons one might want to hook functionality into an existing application. In order to do this there are a few dangerous or complex steps. By centralizing the code for these we can hope to get them right.

As an example, MobileSubstrate provides a simple platform (one integrated with Cydia) for deploying code that gets inserted into graphical applications. Eventually it will be able to provide error handling and fallback support (think of a "Safe Mode").

As a library, it has started taking on generalized versions of the code in WinterBoard to be able to rapidly generate application hooks. Is not yet documented, but will be when I get the time (hopefully soon?).