I work on an incubation team at Microsoft Research in Cambridge, UK. Today we released our first public offering, AutoCollage. In a nutshell, AutoCollage lets you select a folder containing images, and creates a collage synthesized from interesting bits of some of the pictures in that folder. You can see examples of collages here, they're pretty cool IMO.
You can download AutoCollage and try it for thirty days free. If you like it, you can buy it.
AutoCollage works best on Vista, but you can use it on Windows XP SP2 and later, as long as you've got the .NET framework 3.0 or later installed.
AutoCollage is based on a lot of cool research technology from Microsoft. Carsten Rother developed the primary AutoCollage algorithm, incorporating research from Microsoft Research Asia, Redmond, and Cambridge. It's truly a global effort :)
I hope you enjoy it!