Backgrounds By Marie.

Boogie Jack's Web Depot.

BWS Long Playing Computer Graphics.

Cavern of Clipart.
Free Halloween clipart gleaned from alt.binaries.clipart.

Classroom Clipart.

Cooltext.com: Online Graphics Generator.
This site allows you to create and customize logos, buttons, and bullets for free.

Discovery School's Clip Art Gallery.

Free Graphics.

Gifs Net.

Jo's World

Vintage Printables.
The goal at Vintage Printable is to "bring public domain to the public." They take images in academic libraries, put ordinary key words on the images and get them out where search engines can pick them up so everyone can enjoy them.

Wise Gorilla.
Free educational clip art.