The Blend4Web team had just released an update which includes a huge improvement of their UI . My favorite bit is that Blend4Web is now a separate 'render engine' and selecting it will update Blender's interface to only include relevant options.
If we used the traditional way to name versions of our framework, then we would call this release "Blend4Web 2.0" - that's how important the features implemented this time are! Among them, you will find the interface thoroughly revised, the new normal editor, support for all Blender's shading models, proper handling of Cycles nodes and many more.
Have you created an awesome project with Blend4Web? Please submit it as a news story!