Falcon4ever of NUIgroup, created a small demo application called tDesk.
tDesk is an experimental tool running on Windows XP, which enables users with an FTIR multitouch screen to move and resize (multiple) applications with their bare hands.
(1) This movie shows how to move and scale dialogs in windows:
(2) This movie shows how to move multiple dialogs in windows:
Falcon4ever also wrote the Touch tracer application, which works on both Windows XP and Linux.
Visit Falcon4ever's blog for more info.