United States Navy Memorial - site includes the Navy Memorial Log, a database of more than a quarter of a million past and present members of the various sea services who have donated to the Foundation. It is "the only publicly accessible register of the names and service information of naval service personnel." In addition, you can view the bronzes at the memorial dedicated to all seafarers; find links about navy ships, current, decommissioned, histories, and the ship donation program; lists of reunions and veterans organizations; and find old shipmates and related links to the navy and maritime concerns.
Dictionary of American Naval Fighting Ships - site offers over 7,000 histories of individual ships. Entries are divided into The Modern Era and The 'Old Navy' then arranged by type of ship (Battleships, Aircraft Carriers, etc.).