Blend4Web is an open source WebGL framework which uses Blender as the primary authoring tool. It features native support for Blender's node materials, NLA editor, particle system, Bullet physics, positional audio and other Blender functionality.
This repo mirrors the free SDK distribution which can be also downloaded from the official site http://www.blend4web.com/en/downloads/
Described in the manual http://www.blend4web.com/doc/en/setup.html
Blend4Web is GPLv3-licensed. We also provide a commercial license.