Graphics
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.
Swap-Meet - 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.