A few months ago GitHub launched an amazing, albeit limited, support for viewing 3D models directly on GitHub. Since obj files were not supported, and are one of the most prominent 3D files on GitHub (with over 195 thousand files listed against 22 thousand stl files) I’ve created Three-hub.
Three Hub is an open source Chrome Extension that shows the 3D models from the model files when browsing GitHub. You can install it directly from Chrome Store. The source for the extension can be grabbed here.
Here are some amazing models you can see with it already: