These open access sources are readily available to all - without fees or subscriptions. The links connect to European primary historical documents that are transcribed, reproduced in facsimile, or translated.
NYPL Digital Gallery provides free and open access to over 800,000 images digitized from the The New York Public Library's vast collections, including illuminated manuscripts, historical maps, vintage posters, rare prints, photographs and more.
"The Organization of American Historians promotes excellence in the scholarship, teaching, and presentation of American history, and encourages wide discussion of historical questions and equitable treatment of all practitioners of history." (information from the website)