Gnuplot

High Quality Content by WIKIPEDIA articles! gnuplot is a command-line program that can generate two- and three-dimensional plots of functions, data, and data fits. It is frequently used for publication quality graphics as well as educational purposes. The program runs on all major computers and operating systems (GNU/Linux, UNIX, Microsoft Windows, Mac OS X and others). It is a program with a fairly long history, dating back to 1986. This software is not distributed under the GPL license, opting for its own open source license instead.