A bicycle mount for the iPhone 5. To be used without a case. Mounts on most sizes of round bars both horizontal and vertical using the OpenSCAD file. A 4/4s version could be made with very slight modifications.
Edit: I added an OpenSCAD file for generating a clamp for a wide array of bar sizes as well as a horizontal option. (My first OpenSCAD file. Looks like it works well enough.)
Visit blog.rwillbrown.com/?p=183 for design insight and more information!