100000 free cliparts
This site offers thousands of free cliparts images and it doesn't pester you with pop-up ads, unlike many similar resources. there's a handy lightbox feature here that lets you save images for later use. you can also have the images that you've selected e-mailed to you in zip format
http://www.100000freecliparts.com/
Clipart-gallery
Über 15000 cliparts, die alle übersichtlich in kategorien sortiert sind. außerdem finden sie alles für ihre homepage: bannerrohlinge, hintergründe, buttons, banner und homepage-sets! alles kostenlos und frei zum downloaden!
http://www.clipart-gallery.de/
Clipartsservice
Clipartsalbum offers thousands of free cliparts. you can easily copy, print, download in a zip-file or send cliparts as an e-card.
http://www.clipartsservice.com/