MovingPhotos3D is a visualization that lets you see your photo library in a new way. It sends your photos flying around the screen in 3D. You can see hundreds of pictures move into different patterns and shapes.
*** Check the paid MovingPhotos3D app for 8 more shapes, and the ability to use the screen saver version at no extra charge. ***
Check the FAQ (support link on this page) if you have any questions. The app starts out in a window, but try it full-screen (menu option or command-F). Click a photo with the mouse to see it close-up. It takes images from your iPhoto library, Aperture library, or any folder you choose (go to Preferences on the MovingPhotos3D menu).
MovingPhotos3D Free is fully functional; it has a selection of 5 shapes from the paid app. That's actually one more than the 4 shapes that the original MovingPhotos3D screen saver came with back in 2008!
Tested on OS X 10.7 Lion.