Calculus Made Easy for the Ti89/Titanium/Ti-92+/Voyage200  
   This Calculus program is an excellent collection of subprograms and menus that will help the user solve almost every imaginable calculus problem and recall useful theorems, definitions, and rules. Instructors will enjoy using this program for in-class dem
   http://www.islands.vi/~shawn/ti_89.htm

Behavioural Calculus by Orfeo Bernardo  
   Behavioural Calculus with Analytical and Visual 3 Space for Windows. Promotional freeware is available.
   http://members.allstream.net/~calculus/

SID2002 Math Expert System  
   Sid2002 is a powerful software that solves any problem in calculus and shows step by step solution using artficial intelligence.
   http://www.geocities.com/ashtry_sid2002/

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