Atlas Obscura: Travel guides.
British Library: The National Library of the UK.
Digital Commonwealth – Massachusetts Collections Online: Operated by the Boston Public Library.
Harry Ransom Center – Digital Collections: Part of the University of Texas at Austin
Internet Archive: Digital Library.
Library of Congress: National Library of the United States.
Multidisciplinary Digital Publishing Institute: Academic journals and publications.
Nationaal Archief: The national archives of the Netherlands.
National Archives and Records Administration: United States Archives.
National Library of Medicine – Digital Collections: Part of the United States National Institute of Health.
Nationalmuseet: National Museum of Denmark.
New East Digital Archive: Preservation project for the cultural legacy of the Calvert Journal.
Rijksmuseum: The national Museum of the Netherlands.
University of Toronto Libraries: Part of the University of Toronto.
Wellcome Collection: Museum and Library in London.