CADAM is the open source text-to-CAD web application
a parametric 3D CAD modeler
Software for electromagnetic simulation
A canvas library for generating technical drawings
OpenNum lets you distribute solvers with a nice graphical interface
Precise gear geometry generator for spur and helical gears
Linux tiny CAD for educational purposes
A designer’s program for describing parts of the building
library to read dwg & read/write dxf files