TB-89	(click here for some screen shots of the prgm.) One of the best math prgms for the 89 if your in algebra this program is  a must. (coded by Adam Franks <kaizer_911@yahoo.com> & J. Boylan <JBoylan@Technologist.com>)
MathSoft	(click here for a screen shot of the prgm.) Another great program for geometry, and algebra (coded by John David Ratliff <jdratlif@indiana.edu>)