Placemat - Pretty nice placeholder images.
XScreenSaver - XScreenSaver is the standard screen saver collection shipped on most Linux and Unix systems running...
Fill Murray - Custom-sized placeholder images of Bill Murray
Fliqlo Screensaver - A screensaver that displays the time using a flip clock.
PlaceKitten - Dead-easy placeholder images. Of kittens.
Padbury Clock Screensaver - Minimal screensaver for Mac