Gnuplot

Newer gnuplot modules (e.g. Qt, wxWidgets, and cairo drivers) have been contributed under dual-licensing terms, e.g. gnuplot + BSD or gnuplot + GPL.

GUIs and programs that use gnuplot Several third-party programs have graphical user interfaces that can be used to generate graphs using gnuplot as the plotting engine.

Alternatively, gnuplot can be used for the same purpose.

Features gnuplot can produce output directly on screen, or in many formats of graphics files, including Portable Network Graphics (PNG), Encapsulated PostScript (EPS), Scalable Vector Graphics (SVG), JPEG and many others.

It was named as part of a compromise by the original authors, punning on gnu (the animal) and newplot. citation Official source code to gnuplot is freely redistributable, but modified versions thereof are not.