Clip Art
581 images from "Bilder ur Nordens Flora" (1901-1905)
AIGA - International Symbol signs
Antique Web Graphics from The Olden Times
Clipart ETC: educational clip art
Fifties Clipart, Rewind the 50's Clip Art Image Directory
Mandarin Design's free gallery of groovy squares
NASA Dryden Research Aircraft Image Collection
Public domain images from the 1911 Webster's Dictionary
Shannanigans: clipart for your amusement