"A mathematical utility that lets you show ordinary, parametric and differential equations graphically."
Graphmatica is a mathematical utility designed to be able to graphically represent all types of calculations and numerical equations.
Some of the functions that Graphmatica lets you show are: cartesian functions, relational functions (both current and unequal), equations (ordinary, parametric and differential) etc.
Also from Graphmatica you can view the behaviour of some tangential lines, integers, critical points, inflection points in cartesian functions, etc. All the graphic representations can be copied to the Windows clipboard or saved directly in BMP format.