AMERICAN HISTORY
- Archiving Early America
- Digital History
- Digital Public Library of America
- Famous Trials (U.S. & International)
- The Gilder Lehrman Institute of American History
- History Matters: The U.S. Survey Course on the Web
- Library of Congress: The American Folklife Center
- Library of Congress: American Memory (Primary Sources)
- National Archives
- The National Security Archive: The George Washington University (U.S. & International)
- New York Public Library Digital Collections (U.S. & International)
- openVAULT
- Spartacus Educational (U.S. & International)
- The Valley of the Shadow (Primary Sources)
BRITISH HISTORY
CANADIAN HISTORY
INTERNATIONAL
- The British Library Online Gallery
- The European Library
- Famous Trials (International and U.S.)
- New York Public Library Digital Collections (International & U.S.)
- The New Zealand Digital Library
- Nobelprize.org
- 1914-1918-Online. International Encyclopedia of the First World War
- Spartacus Educational (International & U.S.)