BBC History Online - For fans of World and British History (as I am).
HistoryChannel.com - Has a plethora of information and many links.
HistoryCenter.net - I love the international focus on this site.
The History Guy - A site that is very strong in US History.
HistoryWiz - A fun site.
HyperHistory Online - An ongoing project that has the potential to deliver much.
Napoleon.Org - For those that appreciate the Little Corporal.
Nostradamus - For those interested in the prophecies of the Seer.
Spartacus Educational - Great beginner site for World History.
WhoWhatWhen - An excellent Interactive timeline site.