BIOGRAPHIES

Biographical Dictionary
http://www.s9.com/biography/

Biography.com
http://www.biography.com/

PBS Biographies
http://www.pbs.org/neighborhoods/history/#bio

Gale (free resources)
http://www.galegroup.com/free_resources/

Who2?
http://www.who2.com/

Grolier's American Presidency
http://gi.grolier.com/presidents

POTUS
http://www.ipl.org/ref/POTUS

President of the United States http://www.whitehouse.gov/history/presidents/index.html

Presidents of the United States
http://www.presidentsusa.net/

Presidents Index
http://odur.let.rug.nl/~usa/P/
offers profiles, as well as links to speeches, writings, and libraries.