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. (Wikipedia, GFDL) More info »
please add somebody an icon: http://allmyapps.com/data/o/c/octave30-gnu-octave/icon_48x48__usr_share_octave_3.0.0_imagelib_octave-sombrero.png