Tons of Free Clip Art!
I love sharing my image collections. This site--as you might gather--is my clip art collection. The clipart is available in .jpg, .png, .svg and .eps format (not every image is in multiple formats). I also have a few themed .eps collections available for download as zip files.
I can't verify that all of these images are copyright free, therefore I don't recommend using them for commercial projects like catalogs or for-profit promotional material. That leaves plenty of things you can use these pictures for: personal websites, blogs, forums, scrapbooks, handmade cards, zines, etc.
No credit is needed. The only thing I ask is no hot-linking. Just save it to your own computer--don't suck off my bandwidth, dude!
I also have other websites that offer free images, photos & one dedicated to retro/fifties clip art:
Wicked Good Images: Free photos, ephemera, pulp art, pin-ups, icons, backgrounds & textures.
Free Retro Graphics: Free fifties clip art with some retro 60s images stuck in there too.
The Retro Kitchen: I have a section of cookbook clipart from the 1950's.
Free Retro Backgrounds: Tiling & full page background and desktop images from the fifties and sixties.
Featured sample:
