Best of History Web Sites, created by EdTechTeacher Inc, is an award-winning portal that contains annotated links to over 1200 history web sites as well as links to hundreds of quality K-12 history lesson plans, history teacher guides, history activities, history games, history quizzes, and more. *Lots of animated, interactive games.
University of Maryland's Global Terrorism Database (searchable!)
Historical Census Browser from the University Of Virginia (1790-1960):
Eyewitness to History: "Your ringside seat to history - from the Ancient World to the present. History through the eyes of those who lived it, presented by Ibis Communications, Inc. a digital publisher of educational programming." *Includes interviews, film clips, and radio broadcasts