CAD Application entire developed in Python
A canvas library for generating technical drawings
Did you ever made a production machine on steroids?
Free 3D Mobile CAD
AVR simulator IDE
Parallel finite element analysis
Open DXFs with QCad
Modular CNC software for Arduino controller
GCode sender for ramps and marlin firmware for CNC Milling Machine
A finite element data exchange system
qnutCNC is a program to control the ethernut development board