Public Domain Graphics Resources
- Google Advanced Image Search
- Compfight- A Flickr Search Tool
- Pixabay
- PicDrome
- TinEye Creative Commons search of images by color
- American Memory Collection-(Library of Congress)
- FreeDigital Photos
- Old Pictures (historic photos from 1850s to 1940s)
- National Gallery: NGAImages
- USA.gov Photos & Images
- University of Texas’s Portrait Gallery
- Smithsonian Galaxy of Images
- Internet Archive Moving Images
- National Parks Service Imagebase
- Discovery School Clip Art Gallery
- National Archives
- New York Public Library Picture Collection
- World Atlas Maps clip art
- NASA Library of Images
- Prints and Photographs Online Catalog
- Internet Moving Image Archive
