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Gnuplot is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms. The source code is copyrighted but freely distributed (i.e., you don't have to pay for it). It was originally created to allow scientists and students to visualize mathematical functions and data interactively, but has grown to support many non-interactive uses such as web scripting. It is also used as a plotting engine by third-party applications like Octave. Gnuplot has been supported and under active development since 1986.

Gnuplot supports many different types of 2D and 3D plots

Here is a Gallery of demos.

Gnuplot supports many different types of output

interactive screen display: cross-platform (Qt, wxWidgets, x11) or system-specific (MS Windows, OS/2)
direct output to file: postscript (including eps), pdf, png, gif, jpeg, LaTeX, metafont, emf, svg, ...
mouseable web display formats: HTML5, svg


Current release is 4.6 (patchlevel 6) Version 5.0 Release Progress The Development version is gnuplot 5.1

Release History
  • gnuplot 5.0 January 2015
  • gnuplot 4.6.6 (current version) September 2014
  • gnuplot 4.6 March 2012
  • gnuplot 4.4 March 2010
  • gnuplot 4.2 April 2007
  • gnuplot 4.0 April 2004
Copyright/licensing
 
Gnuplot Book Cover   Gnuplot in Action
Understanding Data with Graphs

by Philipp K. Janert
Manning Publications (2009)
ISBN: 1933988398
ISBN-13: 978-1933988399
  gnuplot Cookbook
by Lee Phillips
 
Packt Publishing (2012)
ISBN : 184951724X
ISBN-13 : 9781849517249