A portable, multi-platform, command-line driven graphing utility
A famous scientific plotting package, features include 2D and 3D plotting, a huge number of output formats, interactive input or script-driven options, and a large set of scripted examples.
zimg generates png / jpeg images from arbitrary formatted 2-D ascii or binary data. zimg is a commandline tool and suitable for rendering large amounts of 2-D data. zimg is highly configurable via commandline switches and dynamically loadable objects.