Mathgrapher is a free mathematical graphing tool for 2D and 3D functions and data. It includes statistical tests, linear and nonlinear curve fitting, integration and analysis of coupled ordinary differential equations (ODE's), iteration and analysis of multi-dimensional iterative maps, matrix operations, Lindenmayer systems and some cellular automata. Many demonstrations show you step by step how to use the program.
It is free!! Mathgrapher ranges between a professional hand-held (graphical) calcutator and professional mathematical software packages lik mathematica
This software is designed for students, math teachers, scientists, engineers. Anyone who is interested in mathematics and looking for an easy tot use software package.