Firefox 3D Canvas FPS Engine
axonis writes "Benjamin Joffe has developed Canvascape - "3D Walker", a simple javascript browser based 3D first person game engine that shows off the capabilities of the Canvas tag found in Firefox, Safari and Opera. " Don't expect much except a proof of concept ;)
Now include a Wiki environment and people can dynamically built and develop on the levels. Looks nice, really.
Its funny to see things popup that have been done before but with standards that never made it....