Below are useful and trustworthy websites on history topics:

U.S. History | Northwest History | Library of Congress | National Archives | World History

U.S. History

• American Business Leaders of the 20th Century Information about major 20th century American companies and their CEOs and founders, compiled and hosted by the Harvard Business School
• American President: An Online Reference Resource Contains information and multimedia concerning each of the American Presidents, hosted by the University of Virginia
• Boston African Americana Project Materials relating to the history of African-American life in Boston with an emphasis on primary documents, coordinated by the Boston Athenaeum
• Digital Library on American Slavery A database of abstracted information on individual slaves, slaveholders and free poeple of color, hosted by the University of North Carolina at Greensboro
• Discovering American Women's History Online A database of collections on the history of women in the US, hosted by Middle Tennessee State University
• Duke Collection of American Indian Oral History Transcripts of first-person accounts of Native Americans from all tribes in Oklahoma, hosted by the University of Oklahoma
• Lincolniana at Brown Digital archive of materials relating to Abraham Lincoln, hosted by the Center for Digital Initiatives, Brown University
• Massachusetts Maps The Massachusetts Historical Society's collection of historical maps of the state of Massachusetts and the city of Boston
• Martin Luther King, Jr. Research and Education Institute An encyclopedia of materials relating to the American civil rights movement and reconciliation in other countries, hosted by Stanford University
• Mississippi Freedom Summer Project 1964 Digital Collection Collection of digitized documents and videos related to the 1964 Freedom Summer, hosted by Miami University 
• National Women's History Museum The official website of the National Women's History Museum of Washington DC
• New York Heritage Digital Collections A research portal into New York state history digital collections, featuring many primary sources and strongest in the late 19th and early 20th century periods. Hosted by New York Heritage
• The Nuclear Vault Resources from the National Security Archives Nuclear Documentation Project, hosted by George Washington University
• Papers of the War Department, 1784-1800 Database of documents produced by the War Department in the early years of the United States, hosted by George Mason University
• SEAAdoc - Documenting the Southeast Asian American Experience Primary documents and images concerning refugees from Southeast Asia, hosted by University of California-Irvine
• Smithsonian Education: Celebrate History and Heritage Months Educational materials and resources on different groups and their heritage months, hosted by the Smithsonian
• Ulysses S. Grant Digital Collection A digital collection of primary documents relating to Ulysses S. Grant, including his military career and presidency. Hosted by Mississippi State University
• Western New York Legacy Digital Library Links to archival collections of institutions in Western New York state, funded by the New York State Education Department
• Wisconsin Historical Society One of the best state historical societies is the Wisconsin Historical Society; this is their webpage

Northwest History

• History Link The Free Online Encyclopedia of Washington State History, funded by the State of Washington and MOHAI
• Northwest Digital Archives The holdings of many local archives, including SPU, the University of Washington and the City of Seattle, hosted by the Orbis Cascade Alliance

Library of Congress

• American Memory The Library of Congress' digital collection, covering many aspects of American history, including advertising, art, literature, immigration, religion, sports, and technology. African American and women's history is also highlighted
• Chronicling America A collection of historic newspapers dating from 1836-1922 and covering most major cities in the United States. Sponsored by the National Endowment for the Humanities and the Library of Congress
• National Jukebox Musical recordings issued by the Victor Talking Machine Company between 1900 and 1925, including band music, ragtime, opera and tunes from musical theater, all playable through the browser window

National Archives

• National Archives Catalog A searchable catalog of the holdings of the National Archives in Washington DC
• National Archives Channel The Youtube Channel of the National Archives, featuring historical films and television video

World History

• 20 Years After: Life Beyond Communism in Central and Eastern Europe A special report website that reports on event in the formerly communist countries of Easter Europe and the former USSR, created by Transitions, a Czech Republic non-profit
• A Vision of Britain through Time A digital collection organized around geography that contains information about places in Britain. The information includes material on employment and poverty; industry; social structure; census reports; and travel writing. Hosted by the University of Portsmouth
• European History Primary Sources An index of scholarly websites that contain digitized primary sources on the history of Europe. Hosted by the European University Institute
• Expeditions & Discoveries Hosted by Harvard Libraries, describes over 40 scientific explorations that took place in the 19th century
• Global Gateway Portal to the Library of Congress's digital international collections and resources
• Holocaust Encyclopedia Hosted by the United States Holocaust Memorial Museum, contains articles on the Holocaust, the Third Reich, victims, resistance and the aftermath of the Holocaust
• Institute of Historical Research Hosted by the University of London, a source for links and information on British and European history, including primary sources
• Islamic Heritage Project A digital collection of Islamic manuscripts, maps and published texts. Most of the documents are primary sources and cover topics such as law, science, history, geography, literature, philosophy and calligraphy, along with some biographies. Hosted by Harvard University
• Making the History of 1989 Hosted by the German Historical Institute of Washington DC and the National Endowment for the Humanities, contains information on the fall of communism in Eastern Europe, including primary sources
• Map History / History of Cartography Created and maintained by the head of the British Library's Map Library, gives information about and images of early maps (pre-1800), and also contains information on maps in general
• Museum of Jewish Heritage The official site of the Museum of Jewish Heritage in New York City, with material on the Holocaust
• New Zealand Electronic Text Centre Hosted by the Victoria University of Wellingon Library, a collection of digitzed images, books, manuscripts and journals on New Zealand and Pacific Island history and culture
• Portugese Culture A digital collection of English-language materials on the history of Portugal, with emphasis on the age of exploration. Hosted by the National Library of Portugal
• World Digital Library Funded by UNESCO, features scanned primary documents from a variety of countries