a parametric 3D CAD modeler
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 ...
Software for electromagnetic simulation
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
Linux tiny CAD for educational purposes
COPanno optimizes the panels cuts.
Free multiphysics simulation software package
Convert DXF drawings of circuit boards to gEDA-PCB files.
An Open source Analysis and SImulation Toolbox for Fuel Cells