All Free Original Clipart
- Icons, backgrounds, bullets, clip art, and pictures.
- http://www.free-graphics.com/

WP Clipart
- Line art and other drawings scaled down for use in documents for typical home or small office printing.
- http://www.wpclipart.com/

FreePhotos.se
- Personal collection placed in the public domain by the photographer.
- http://www.freephotos.se/

Pictures/Graphics - US Fish and Wildlife Service
- Photographs and drawings of fish, other animals, and outdoor scenes.
- http://www.fws.gov/pictures/

Line Art Drawings
- Line drawings of wildlife from the US Fish and Wildlife Service. Art can be used with no approval.
- http://www.fws.gov/r9extaff/drawings/drawing.html

AntiqueClipart.com
- Free archives of Victorian, Edwardian, and American Civil War era images.
- http://antiqueclipart.com/

Bayonet.net
- Clipart images and photos related to the U.S. Army.
- http://www.bayonet.net/clip_art/index.html

Images in the Public Domain
- A collection of images from Webster's New International Dictionary of the English Language, 1911, G & C Merriam Co. Springfield, MA. Includes machines, insects, mammals, mollusks, reptiles, and agriculture.
- http://srufaculty.sru.edu/david.dailey/public/public_domain.htm

Open Clip Art Library
- An archive of copyright free images that can be used for any purpose.
- http://www.openclipart.org/