Windows only: MultiPhotoQuotes is a feature packed replacement for the basic My Pictures Slideshow screensaver included with Windows. If you're running a multi-monitor setup, your favourite feature in MultiPhotoQuotes will definitely be the support for your extra screen space. The basic My Pictures screensaver will only put one picture on a single screen at any given time, which even on a small multi-monitor setup leaves a lot of empty space. MultiPhotoQuotes fills the entire available screen space with a grid of photos. If you like a good quotable every now and then, you can keep the quotes feature on to randomly sprinkle quotes from the included quote books.
Several large quote books are included, but the software has support for standard quote and fortune file formats, and it can even poll online quote databases for new material. You can specify which directories images are pulled from and use exclusion strings so that your pictures from Vegas aren't shuffled in with pictures from your niece's batmitsfah. Even minor aspects of the screensaver—like the spacing between the pictures—can be tweaked from within the preferences panel. MultiPhotoQuotes is freeware, Windows only.