Mac OS X only: Turn your desktop into a photo slideshow using freeware app Wallsaver. Wallsaver is a very simple application written in AppleScript that replaces your wallpaper with the current screensaver. Setting the wallpaper as Flurry (shown above) is pretty annoying, however, using your pictures folder is an excellent way to use your desktop as a digital picture frame. A few months ago we showed Linux users how to get the same effect using a nautilus hack. Thanks, NineTailedFox!