Use node modules with Übersicht
Clone it to your widgets folder and start developing!
With uebersicht-boilerplate, you can make Übersicht widgets that use node modules to render output HTML. It works by executing a js file with node, writing the output to a file and using cat to pipe the output to Übersicht.
Intended as a temporary hack until this is officially supported.
Also gives you a nice way of passing options to your widget.