Remember if you use copyright free images, videos , sounds etc you must provide a link and acknowledgement. You may not use copyright material (that's everything that does not state "copyright free" ) in any public document, including websites or PowerPoint, without having specific written permission from the original web author to do so.
Creative Commons audio, images, text, video, and other formats that are free to share online with atttribution
Free Graphics Store graphics free to use on private or commercial sites, should make link back.
Yotophoto first internet search engine for finding free-to-use photographs and images
Morgue File all images are really free and they can be used in your commercial projects without permission or credit from the photographer
Gimp-Savvy Copyright-Free Photo Archive: Public Domain Photos and Images
JSC Digital Image Collection NASA National Aeronautics and Space Administration US no objection to the reproduction and use of these materials if NASA is acknowledged as the source of the material. If a recognizable person, or talent (e.g., an astronaut or a noted personality) appears in NASA material, you have to obtain permission.
NOAA Photo Library National Oceanic and Atmospheric Administration US No fee is charged for using the photos but credit MUST be given to the National Oceanic and Atmospheric Administration/Department of Commerce
Degree Confluence The goal of the project is to visit each of the latitude and longitude integer degree intersections in the world, and to take photographs at each location. Copyright with individual photographers
Google Images Search From the web, so NOT FREE! Clear usage with copyright holder of original website
Free Backgrounds and Wallpaper Arthur Rackham, Gustave Doré, William Morris, N.C. Wyeth, Aubrey Beardsley, and others. Fairies, angels, gods and goddesses, mythic creatures.
