Pretty Loaded ScreenSaver

Different load screens on this site. You can also download the screensaver for PC or Mac.
Free Wallpaper 4 Me

High resolution desktop backgrounds.
21 Free 3D Wallpapers For Your Computer

Just click on each image to download.
Free ScreenSavers From Duraflame

Neighborhood, Crackling Fire Log, or Evolution Of Fire. For both Mac and PC.
Disk Defrag ScreenSaver

Auslogics Disk Defrag Screen Saver is a handy tool that allows users to run defragmentation of their hard drives in screensaver mode. Like other screensavers in Windows, it starts automatically when a system has been idle for a few moments.
Free High Res Wallpaper

From 2009 National Geographic International Photography Contest. Some of these are amazing!
Free Thomas Kinkade Desktop Enhancements

Themes, Screensavers, Wallpapers, Win Logos, IE Toolbars, Outlook Stationary & more. This is a nice site with some really nice stuff.
Appleblossom Art Free Screensavers & Themes

3D screensavers and desktop themes made of abstract art and fractals. Some of these are very very nice! & its all 100% freeware!