Software

Behavioural Calculus - Offers a range of functionality, including a scientific calculator, function plotting in two and three dimensions, and problem solving. Screen-shots and details of features. Commercial, but free demo version available to download.
pages.zid.com/~orfeo/

Calculus Made Easy for the Ti89/Titanium/Ti-92+/Voyage200 - Collection of subprograms and menus that will help the user solve calculus problems and recall useful theorems, definitions, and rules.
www.islands.vi/~shawn/ti_89.htm

GraphFunc - GraphFunc is a program online that is used to plot the graph of mathematical functions in two or three coordinate systems. You need Java Runtime Environment to use this site.
graph.seriesmathstudy.com

The Integrator - An online integrator that automatically evaluates integrals.
integrals.wolfram.com/

SID2002 Math Expert System - Solves problems and shows step by step solution using artificial intelligence.
www.geocities.com/ashtry_sid2002/