These sites contain material that is generally free to use, uncopyrighted, whose copyright has expired, or is uncopyrightable. The last includes resources from US government agencies, educational organizations and companies that provide materials for students and teachers.
American Memory from the Library of Congress
American Memory provides "free and open access through the Internet to written and spoken words, sound recordings, still and moving images, prints, maps, and sheet music that document the American experience." Although the Library of Congress provides some copyright information about the items in this collection, "it is the researcher's obligation to determine and satisfy copyright or other use restrictions when publishing or otherwise distributing materials found in the Library's collections."
"The materials included in the Digital History website are original works of authorship, government records, works for which copyright permission has expired, works reprinted with permission, or works that we believe are within the fair use protection of the copyright laws."
Library of Congress Learning Page
"The Learning Page is designed to help educators use the American Memory Collections to teach history and culture. It offers tips and tricks, definitions and rationale for using primary sources, activities, discussions, lesson plans and suggestions for using the collections in classroom curriculum."
This site contains teaching resources and information for educators. It also contains many images and video galleries.
National Oceanic and Atmospheric Administration Photo Library
is site holds Albums and Catalogs containing over 20,000 images! Most NOAA photos and slides are in the public domain and cannot be copyrighted.
The NYPL Picture Collection Online
"The digital collection of images presented here is taken from the in-print collection of images that New York Public Library has been collecting since 1915."
Picture History is "an on-line archive of images and film footage illuminating more than 200 years of American history."
FreeFoto.com describes its site as "the largest collection of free photographs for private non-commercial use on the Internet."
Pics4Learning promotes its site as "a copyright-friendly image library for teachers and students." Their collection includes "thousands of images that have been donated by students, teachers, and amateur photographers. Unlike many Internet sites, permission has been granted for teachers and students to use all of the images donated to the Pics4Learning collection."