The new AR Kit for the iPhone which was created at the iPhoneDevCamp3

Open Source – AR Kit at http://www.iphonear.org
Developed by Chris Haseman, Zac White, Charles Ruelle, Arshad Tayyeb, Sid Gabriel Hubbard.
The AR Kit is an open source UI library for displaying location based data in spherical coordinate systems mirroring UI Kit on the phone. A list of CLLocation objects can be submitted and our library will handle drawing of the locations on screen.