Recently on Base22 we started to evaluate Electron:
Electron is an open source library developed by GitHub for building cross-platform desktop applications with HTML, CSS, and JavaScript. Electron accomplishes this by combining Chromium and Node.js into a single runtime and apps can be packaged for Mac, Windows, and Linux.
Our initial evaluation and findings, covering some key elements we considered important are documented on the next Base22 public wiki page: Electron – Build cross platform desktop apps
I really hope you find this information useful.