Z-Plot is a free plotting software that allows you to visualize a multitude of mathematical functions and curves. The software has a powerful mathematical formula interpreter, that also allows the user to handle complex numbers, easily. The display can be switched from 2D to 3D mode. Additionally, diagrams can be made from a data table. Selected program features: -3D/2D display that be rotated and scaled freely -The common mathematical functions are supported -Calculating with complex numbers is supported by any mathematical operation. Additionally, it is possible to determine the real part, imaginary part, argument and absolute value of complex expressions. -Choose between linear and logarithmic axes scaling. -Integrated calculator including numerical integral and differential calculus -Make diagrams from a data table -With detailed online help.