Math

CuriousMath
http://www.curiousmath.com
Mathematical tricks, tips, and shortcuts to impress your friends and make homework a little easier.

Euclid's Elements
http://aleph0.clarku.edu/~djoyce/java/elements/elements.html
Euclid's treatise, with geometric concepts illustrated with movable figures using Java applets.

Math in the Movies
http://world.std.com/~reinhold/dir/mathmovies.html
"A Guide to Major Motion Pictures with Scenes of Real Mathematics."