GNU Octave
Octave is a computer program for performing numerical computations which is mostly compatible with MATLAB. It is part of the GNU Project. It is free software under the terms of the GNU General Public License. GNU Octave is a high-level interpreted language, primarily intended for numerical computations. It provides capabilities for the numerical solution of linear and nonlinear problems, and for performing other numerical experiments. It also provides extensive graphics capabilities for data visualization and manipulation. The Octave interpreter can be run in GUI mode (new in version 4.0.0), as a console, or invoked as part of a shell script. Octave is normally used through its interactive interface, but it can also be used to write non-interactive programs.
