Business graphics diagramming application + customizable shape lib.
Free vector,quaternion,matrix math library
Object-oriented, interactive JavaScript vector graphics library
Create and edit SVG graphics directly in ownCloud. Based on svg-edit.
dedalo is a 2d cad drawing software written in python3.
Console Drawing
Inkscape extension to add and edit GNUplot graphs
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