imSimReal is an open source physics framework for use with the Mac and iPhone. It is based on the book, Physics for Game Programmers. It is written in Objective-C so it fits well with Cocoa and Cocoa Touch projects. The source code is released under an MIT open source license. Feel free to use it, or portions of it, however you like, just give credit to the source.

You can get the latest source from GitHub. Or you can go to our downloads page to get a disk image containing the latest.