Princeton University Historical Photograph Collection: http://library.princeton.edu/resource/7512, Contains descriptive information on over 20,000 photographs found within the University Archives Historical Photograph Collection, 1840s-1996
“History Hub is a support community managed by the National Archives for researchers, citizen historians, archival professionals, and open government advocates. Join in the conversation!” https://historyhub.archives.gov/welcome
“SNAC is demonstrating the feasibility of separating the description of persons, families, and organizations—including their socio-historical contexts—from the description of the historical resources that are the primary evidence of their lives and work. A key objective is to provide researchers with convenient, integrated access to historical collections held by multiple private and public archives and libraries around the world while also setting the stage for a cooperative program for maintaining information about the people documented in the collections.” http://socialarchive.iath.virginia.edu/
Clio https://www.theclio.com/web/ has quickly become a favorite for teachers and the public. This free educational website and mobile app guides picks up a user’s location and offers them information about nearby history.
Folkstreams.net: ” A National Preserve of Documentary Films about American Roots Cultures ; streamed with essays about the traditions and filmmaking. The site includes transcriptions, study and teaching guides, suggested readings, and links to related websites.” http://www.folkstreams.net/?list=3
The Internet Archive : ” The Internet Archive has some really great stuff. Among the many things on offer, it provides access to thousands of digitized books at libraries around the world. All kinds of good primary sources in there.” http://www.archive.org/index.php
University of North Carolina, Documenting the American South : ” Documenting the American South (DocSouth) is a digital publishing initiative that provides Internet access to texts, images, and audio files related to southern history, literature, and culture. Currently DocSouth includes fourteen thematic collections of books, diaries, posters, artifacts, letters, oral history interviews, and songs.” http://docsouth.unc.edu/index.html
Social Explorer, Visually Explore Demographic Data: 220 years of demographic data, 25,000 maps, hundreds of profile reports, 40 billion data elements and 335,000 variables: https://www.socialexplorer.com/