ww2 maps

http://www.dean.usma.edu/history/web03/atlases/ww2%20europe/ww2%20europe%20war%20index.htm
http://www.dean.usma.edu/history/web03/atlases/ww2%20pacific/ww2%20pacific%20war%20index.htm

US Military Academy - maps on WW2.

http://www.evidenceincamera.co.uk/

Aerial Reconnaissance Archives

http://history.acusd.edu/gen/WW2Index/picindexmapsi.html

University of San Diego

http://www.lib.utexas.edu/maps/historical/history_ww2.html#European
http://www.lib.utexas.edu/maps/historical/dday.html

University of Texas at Austin