Hello!
It seams that Yogurt3D is the next generation of 3D web developers. But I was unable to use it because I don't know how can I combine Blender with Yogurt...
If Yogurt is Open Source, Blender can be your "brother" on exporting from BGE (Blender Game Engine) to Web Browser using Yogurt. Or even just recognizing the .blend file, or the models designed in Blender, animations...

Thanks,
Pedro