Waterloo Maple's MathView offers a new, interactive way of exploring and exchanging mathematical ideas. It's a browser plug-in that lets you edit and manipulate algebraic expressions, and animate and rotate graphs embedded in Web pages.
(This is a new product and has some rough edges. It is better used for display or by experienced mathematicians than by students for exploration.)
In the "Exploring Mathematics" section of the Cyberview site you can apply interpolating curves to the design of a mini-van, calculate the voltages in an AC circuit, or study projectile motion. You'll find subjects at the high school, college, and graduate levels, including: