If you’ve got a bunch of pictures that you want to show off in a slide show screensaver, then Google Photos Screensaver is your best option. It’s easily the best software in the Google Pack collection and it’s definitely better than My Pictures Slideshow in Windows.
The Pan and Zoom Visual Effect is very, very pleasing to the eyes. And aside from your local pictures, you can even have pictures from photo feeds to be displayed as well.
Get it here: http://pack.google.com/screensaver.html