GLE (Graphics Layout Engine) is a high-quality graphics package for
scientists, combining a user-friendly scripting language with a full
range of facilities for producing publication-quality graphs,
diagrams, posters and slides. GLE provides LaTeX quality fonts
together with a flexible graphics module which allows the user to
specify any feature of a graph. Complex pictures can be drawn with
user-defined subroutines and simple looping structures. Current output
formats include EPS, PS, PDF, JPEG, and PNG.