a parametric 3D CAD modeler
Examples and demos for the pythonocc CAD package
Cross-platform Open-source 2D CAD
An interactive viewer for three-dimensional chemical structures.
Model Railway CAD program
Static and Dynamic Structural Analysis of 2D and 3D frames.
An EnergyPlus shell for parametric studies and more ...
Draw vector graphics to scale using a descriptive language
Convert any image to gerber and drill files
Software for electromagnetic simulation
Extensible Line-drawing & Polygon-filling Rasterization Libs for Java
A canvas library for generating technical drawings
Open Source Solid Modeling CAD
OpenNum lets you distribute solvers with a nice graphical interface
Precise gear geometry generator for spur and helical gears
CAD 2D for Land Surveying and Civil
Linux tiny CAD for educational purposes
COPanno optimizes the panels cuts.