http://www.emulateme.com
A searchable encyclopedia on the history and geography of countries.

http://www.50states.com
A searchable encyclopedia of the 50 states and more.

http://maps.com
A large archive of maps with many applications.

http://archer2000.tripod.com
A listing of important U.S. events for each year of the century.

http://webpages.homestead.com/revwar/files/index.htm
A comprehensive website devoted to the American Revolution.