Blue Cat Icons
[ http://www.totoro.org/jen/bluecat/ ]
Offers desktop customization services such as custom and modified icons, IM icons and wallpaper for Mac and Windows.
[ http://www.theswapmeet.com/ ]
An interactive community that is focused on graphics programming and specifically 3D.
The Graphics File Format Page
[ http://www.martinreddy.net/gfx/ ]
Provides information on various graphic files and also has some utilities relating to them.