GLE (Graphics Layout Engine) is a graphics scripting language designed for
creating publication quality graphs, plots, diagrams, figures and slides. GLE
supports various graph types (function plots, histograms, bar graphs, scatter
plots, contour lines, color maps, surface plots, ...) through a simple but
flexible set of graphing commands. More complex output can be created by
relying on GLE's scripting language, which is full featured with subroutines,
variables, and logic control. GLE relies on LaTeX for text output and supports
mathematical formulea in graphs and figures. GLE's output formats include EPS,
PS, PDF, JPEG, and PNG. GLE is licenced under the BSD license.

A suggested dependency is a LaTeX package.