Was working on berkelium fork for a bit, turned out to be pretty nice library. It is a combination of my enhanced berkelium port called 'webify' and jsLINB framework. jsLINB is javascript GUI toolkit with great WYSIWYG editor and many prebuilt controls. Editor looks something like this: http://pastebox.it/get/img/6d7b0d34c81dc...shot_2.png

Previously i got it implemented in ogre3d, now figured ill give esenthel a shot. Basically only one thing is lacking - focused windows do not prevent game from receiving input, but ill tackle it soon. The result:
http://pastebox.it/get/download/ac97a4df...shot_1.png

All this also uses jQuery and you can build your in-game web browser that supports flash just with an iframe.

Awesome stuff! Never heard of jsLINB, but the GUI editor seems useful..

it is. with a little bit of hacking you get WYSIWYG editor that saves GUI to your game GUI folder directly. Also running GUI does not require internal webserver fake http://gui/ domain reads stuff directly from Data\gui folder. Using esenthel IO funcs it even reads data from paks without additional modifications.