The following Temple databases provide electronic reproductions of full-text primary-source documents including maps, letters, diaries, oral histories, memoirs and other personal narratives. Many of these databases are relevant to the history of other parts of the world including Africa, the Americas, and Asia.
EuroDocs is an online directory of primary documents in Western European history compiled by Richard Hacken, librarian at Brigham Young University.
Highly recommended.
The National Archives of the United Kingdom (compare with NARA in the U.S.)
Online collection highlight: U.K. Cabinet Papers: 1915-1980
Europeana is a rich collection of digital primary source content from the archives of Europe.
Researching France or the effect of the French Revolution on other parts of the world? Check out the French Revolution Digital Archive, an open-access collaboration between Stanford University Libraries and Bibliothèque nationale de France.