Graphmatica is a powerful, easy-to-use, equation plotter with numerical
and calculus features. Graph Cartesian functions, relations, and
inequalities, plus polar, parametric, and ordinary differential
equations. Up to 999 graphs on screen at once. Offers copy to clipboard
(bitmap and vector formats), graphical and numerical display of tangent
lines and integrals, on-line help, and demo files. In summary,
a great tool for students and teachers of anything from high-school
algebra through college calculus.
Maybe one of these days I'll get around to putting a Linux partition
on my hard drive...
Java
If I ever get motivated enough to try to learn Swing, I will
probably do it by trying to port this program. It would be interesting to
see how well it really works...
Graphmatica 
