a parametric 3D CAD modeler
Free and open source pattern design software
An EnergyPlus shell for parametric studies and more ...
LibrePLM integrates CAD editors in Odoo / LibrERP
cppcam is a 3D CAD app for drafting G-Code toolpaths for CNC Routers
CAD 2D for Land Surveying and Civil
Parallel finite element analysis
CNC control software