dedalo is a 2d cad drawing software written in python3.
Inkscape extension to add and edit GNUplot graphs
Console Drawing
A tool written in Python to draw Splines in MAXONs Cinema 4D
Obsolete: use https://github.com/VMML/vmmlib
FootballSketch is the perfect application for ambitious coaches.
A powerful C++ class library for image manipulation
automata editor