- FreeCAD https://www.freecadweb.org/
- LibreCAD https://librecad.org/
- Open Cascade https://www.opencascade.com/
- OpenSCAD https://openscad.org/
- QCad https://www.qcad.org/
- Sweet Home 3D https://www.sweethome3d.com/
- SketchUp https://www.sketchup.com/es
- FreeCAD
- LibreCAD
- OpenSCAD
- QCad
- Sweet Home 3D
- SketchUp
No es software libre pero es gratis, para saber vea
https://es.wikipedia.org/wiki/SketchUp