See the demos:

• Simple
• Multiple meshes on the same page (Use lots of RAM)
• Paste your models and see them rendered in real time!
• Experimental step support
• Lines support
• Experimental animation support
• Load a model by url (in the same server)
• Showing a rotating object
• Using jquery instead of prototype
• Error handling
• Upload your models and see them rendered in real time!
• Different background and lighting colors