Hi, guys.
Our company, Source Side LLC, is happy to announce our new product - Sevo iOS Engine. It is the first native 3D game framework written in Objective C allowing creation of 3D games and applications of any level of complexity without the knowledge of graphical API of OpenGL and complicated physical algorithms.
http://source-side.com
Sure we are using the Bullet for Physics. Currently you can download the RC1 and try to create simple iOS application.
Do not hesitate to contact us via Forum or our Contact form if you have any questions or want to provide some feedback.
Also there is Gallery section with few images from our engine. Thanks