The new engine profile for node-webkit has started.
A nice introduction by Cheng Zhao for the app runtime based on Chromium and node.js is located here:
The engine supports apps written in HTML5, CSS3, JS and WebGL. It supports Node.js APIs and all it's third party modules. The performance is optimized because Node.js and Webkit use the same thread.
The project is maintained by Roger Wang at Github.com
Available for Windows, Mac and Linux.