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An increasing number of WebGL based protein viewers are becoming available. Here a collection of all the viewers that I could find so far (sorted alphabetically).
http://istar.cse.cuhk.edu.hk/iview/
https://github.com/arose/ngl
http://wwwtyro.github.io/speck/
- supports Ambient Occlusion
http://jsmol.sourceforge.net/ cross compiled version of the Jmol Java applet
http://www.ncbi.nlm.nih.gov/Structure/icn3d/full.html?mmdbid=1kq2
http://webchemdev.ncbr.muni.cz/LiteMol/
Ambient Occlusion and Chimera