If you would like to use it in your projects and experiments or contribute you are more than welcome!
J3D currently does not have any kind of documentation As far as documentation goes, there are API docs and a couple of tutorials listed below. Please report bugs in the issues section - I'll do my best to fix them.
Most of the demos should work work in all WebGL enabled browsers, including Chrome, Firefox, Opera 12 Alpha and Safari (with WebGL enabled) on desktop. Some demos only run in alpha/nightly builds of selected browsers. Some demos run in Firefox on Android.