graphing program
Yes, Mathamation is a commercial program. Before you spend your bucks, you
should know that Mathamation will not be upgraded in the future. I called
Progressive Peripherals a few months back about add on "modules", but they
said that the programmer that developed it will not upgrade it. As it
stands now, though, it's not too bad a program.
I've also heard of a program called MathVision, but know nothing about
it.