German ships of World War II

Aircraft carriers of World war 2: Information about the aircraft carriers of all the major combattants of World War II, with plenty of reference photographs
Battleship Bismarck 3D: Very good 3D images of both Bismarck as a whole and smaller details of the ship
KBismarck.com - The Battleship Bismarck: Extensive website about Bismarck, with details about both its active service life and the later recovery of the wreck, as well as a lot of information from original documents
PRINZ EUGEN.com - the Kriegsmarine Online Photo Archive: Very extensive photo and information database of the Kriegsmarine
u47.org - the story of the "bull of Scapa Flow": Excellent website, in several languages, with very thorough information about the U-47 submarine, which attacked Scapa Flow in 1939
uboat.net - The U-boat War 1939-1945: Very good website about the German submarine warfare, with details about each type, and a lot of additional articles. Also includes information about the Allied anti-submarine methods