'Gui4cli', and 'Fold And Drop'

Gui4cli

Gui4Cli is an interface maker. Allows anyone with lots, little or no previous programming experience to create Guis in minutes. All you do is write a script (a normal text file) and just run it. You can visually edit it to make it just the way you want it. Gui4Cli has many abilities (listviews, treeviews, tabs, combos and all other controls, timers, databases, jpg/gif/bmps, icons, directx, fonts, registry control, etc etc), a rich command set and an easy, intuitive language to handle it all with.

http://users.hol.gr/~dck/g4c/html/Description.htm

Fold And Drop

Fold n' Drop is a new interaction technique for seamlessly dragging and dropping between overlapping windows. It allows you to fold windows while dragging objects. Research demo.

http://liihs.irit.fr/dragice/foldndrop/