From Computer Worlds’s The top 25 overlooked and underrated features in Leopard: “Leopard harnesses the Core Animation libraries code that developers can use to imbue applications with all manner of animated elements to offer [a] stunning new screensaver options [that works] with iPhoto albums or folders of photos that you select….[It] creates a photo mosaic image — the type we’ve all seen in poster shops where one iconic picture, such as a movie poster for the Star Wars trilogy, looks like a solid image from a distance, but when you get close you see it’s really made of hundred and hundreds of still shots from the movies. It does this constantly, creating a new image of a photo in the album, using tiny versions of the other photos in the same album. Truly, this stunning effect is one that needs to be witnessed to be fully appreciated.” [Editor's note: I just witnessed this for the first time, and my jaw dropped. If you're running Leopard, make sure you check it out.]