http://www.public-domain-image.com/

http://www.public-domain-photos.com/

http://www.photos8.com/

http://www.4freephotos.com/

http://www.publicdomainpictures.net/

http://ushistoryimages.com/

http://www.freephotos.lu/

http://www.republicdomain.com/

http://public-photo.net/

http://public-domain.zorger.com/

http://www.easystockphotos.com/

http://karenswhimsy.com/public-domain-images/

http://gimp-savvy.com/PHOTO-ARCHIVE/

http://www.clker.com/

http://opendomain.blogspot.com/

http://www.logodesignweb.com/stockphoto/

http://www.freephotos.se/

http://www.publicdomainfootage.com/

http://publicdomain.photopress-spain.com/

http://finallycreative.com/gallery

http://pddepot.com/

http://home.nps.gov/applications/hafe/hfc/npsphoto.cfm

http://images.fws.gov/

http://images.usace.army.mil/main.html

http://memory.loc.gov/

http://photogallery.nrcs.usda.gov/Index.asp

http://photolibrary.usap.gov/

http://www.ars.usda.gov/is/graphics/photos/

http://www.census.gov/pubinfo/www/broadcast/photos/

http://www.defenselink.mil/multimedia/

http://www.dodmedia.osd.mil/

http://www.gpoaccess.gov/pictorial/index.html

http://www.photolib.noaa.gov/

http://www.usa.gov/Topics/Graphics.shtml

http://www.pdphoto.org/

http://www.publicdomainsherpa.com/public-domain-photographs.html

http://www.burningwell.org/

Catagories:

http://www.dotgovwatch.com/?/archives/8-The-Best-Copyright-Free-Photo-Libraries.html

http://www.unclesamsphotos.com/