Shoebox is a pure Python version/rewrite of Nodebox, a Mac OS X application developed by Frederik Bleser and Tom de Smedt at St. Lucas University in Antwerp, Belgium, from the DrawBot application developed by Just van Rossum.
Shoebox uses the Cairo graphics engine for rendering, and instead of a full-fledged GUI it provides a simple command-line interface and the ability to be called from external Python scripts without effort.