Descartes (plotting tool)
Encyclopedia
descartes is a platform independent image, data, and function plotter, with underlying Python
scripting in the background. Its source code is released under the GNU GPL licence.
Python (programming language)
Python is a general-purpose, high-level programming language whose design philosophy emphasizes code readability. Python claims to "[combine] remarkable power with very clear syntax", and its standard library is large and comprehensive...
scripting in the background. Its source code is released under the GNU GPL licence.