FreeCAD
FreeCAD, the open source 3D parametric modeler
Advantages
1. Free and open source
2. An active community of users and developers
3. Allows functionality to be extended with modules that can be developed by users.
FreeCAD details
Open source
1. Free and open source
2. An active community of users and developers
3. Allows functionality to be extended with modules that can be developed by users.