WinPlot

Winplot is a general-purpose plotting utility, which can draw (and animate) curves and surfaces presented in a variety of formats.

Each menu has its own help file. The following are general remarks:
Text input is not case-sensitive.
Function definitions are limited to 255 characters.
Some dialog boxes are permitted to stay on the screen indefinitely. They can be closed by clicking a button named “close”, or by pressing Esc.