Photosynth is still in the works, but generating buzz as one of the coolest new photo manipulation tools. It can scape through Flickr to create massive montages of the world's most-photographed destinations.
Editorial note: Whoa! You've found a super-old post here on BuzzFeed, from an earlier era of the site. It doesn't really represent where we are anymore, and may in fact be totally broken, but we're leaving it up as a part of our early history.