Techical:

http://www.bensoftware.com/
http://www.stopmotionpro.com/ (For Windows XP, 98 (SE), ME and 2000).

Historical:

Eadweard Muybridge: http://web.inter.nl.net/users/anima/chronoph/muybridge/index.htm
Etienne-Jules Marey: http://www.expo-marey.com/ANGLAIS/indexGB.htm

Art

Lev Manovich | Little Movies: http://www.manovich.net/little-movies/enter.html
David Blair | Wax Web ; http://jefferson.village.virginia.edu/wax/englishStart.html