Links to Pythagorean Theorem Proofs
Four nice animated gif versions of proofs by Euclid, Bahskara, President Garfield, and Wallis
A set of 38 proofs at Cut-the-Knot
A lesson plan for use with GSP version 3
A highly interactive Java site--try your own proof with Manipula Math Java
A sight with several pages about Pythagoras and the Proofs of the Theorem
A set of JavaScript Math programs
A Pythagorean triple generator
Four proofs of the Pythagorean Theorem
Interactive Geometry at Study Works! Online
A nice animation of a visual proof