On Mar 25, 7:41   㮮 
> For *quick* and *easy*, I'd suggest Shoes
> (http://code.whytheluckystiff.net/shoes/), but it doesn't support
> drag-and-drop that I know of.

Shoes is cross-platform and rather appealing visually. It may support
drag and drop.

One other *really* *really* *really* cool toolkit I discovered
recently is called JUCE. Talk about drag and drop -- you can drag
stuff out of a widget onto your desktop! It also has audio and 3D
interfaces. GSoC mentors, how about Ruby bindings??? ;) ;)

http://www.rawmaterialsoftware.com/juce/