Gnuplot is a portable command-line driven graphing utility for Linux, OS/2, MS Windows, OSX, VMS, and many other platforms.

Gnuplot was 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.

Gnuplot is also used as a plotting engine by third-party applications like Octave. Gnuplot has been supported and under active development since 1986.