CrystalXP offers a large gallery to download their best creations. Best of all, it’s totally free!
 

It is is a large Graphics & Customization community with lots of tutorials and a large forum. They offer a large amount of graphical resources to customize your Operating System.
 
 

The available customization resources include

  • Icons & PNG
  • Wallpapers
  • Visual Styles
  • Skins
  • Screensaver
  • Smileys & Display Pictures

Additionally they offer Bricopacks, installable all-in-one customization packs.

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You like the icons on my site? Well, some of them are downloaded from CrystalXP.net.

http://www.crystalxp.net