gri: 2.12.23 - language for scientific graphics programming

Gri is a language (i.e., command-driven, not point/click) for scientific graphics programming by Dan Kelley and Peter Galbraith.

Some users liken Gri to LaTeX, since both provide extensive power in exchange for patience in learning syntax.

Gri can make x-y graphs, contour graphs, and image graphs, in PostScript and (someday) SVG formats.
Control is provided over all aspects of drawing, e.g. line widths, colors, and fonts.
A TeX-like syntax provides common mathematical symbols.