Euclid of Alexandria
Information about the work and life of the most prominent mathematician of antiquity best known for his treatise on mathematics, The Elements.
www-gap.dcs.st-and.ac.uk/~history/Mathematicians/Euclid.html

Euclid's Elements
Illustrated with movable figures using Java applets.
aleph0.clarku.edu/~djoyce/java/elements/elements.html