Some people consider the GIMP to be the equivalent of PhotoShop. Gnuplot Gnuplot is a command line driven interactive function plotting program. Gnuplot has numerous 2D plotting capabilities and some 3D capabilities. The quality of Gnuplot output may not be suitable for more demanding users. Grace Grace is a two-dimensional plotting tool with a graphical interface and a powerful scripting language.
Grace is derived from some older programs known as xmgr or xvgr.
Ghostscript Ghostscript is a PostScript interpreter. The program can be used to view PostScript files or to convert PostScript into a variety of raster output formats. These utilities are a small collection of programs that manipulate JPEG files. NCAR Graphics NCAR Graphics is an environment of tools for data processing and scientific visualization. The tools were originally developed for use in atmospheric research, but are also useful in other disciplines.