Features Biosearch, a search engine of 30,000+  biographies that gives you easy access to multiple entries on a particular person (e.g., the site offers three separate bios on Lincoln—from the dictionary, almanac, and encyclopedia).

The dictionary covers more than 33,000 notable men and women who have shaped our world from ancient times to the present day. The dictionary can be searched by birth and death dates, positions held, professions, literary and artistic works, achievements, and other keywords.
S9.com is a Wikipedia type system and everyone can edit biographies or even make their own.