Hacker News Reader

Cordova, node-webkit, atom-shell, windows8 ui, gnome ui, etc... All offer options to target html+js to a platform user interface.

I recently did a project with node-webkit and edge.js. There were some hurdles but it ended up working pretty well.

I get to use the both the same HTML-based UI on the web part and the desktop app, as well as the compiled .NET libraries.