FreeCAD
FreeCAD is an open-source parametric modeller for parts, assemblies, drawings and extensible engineering workflows.
A Vector OS connector is not currently listed for this tool.
Workflow ideas
Build a constrained parametric part
Begin with current feature dimensions, datums and design intent. In the intended FreeCAD preview, build a constrained parametric part; the visible result is the revised solid and its driving constraints. Review interfaces, retained references and manufacturable intent before accepting or exporting it.
Assemble reusable components
Use the selected part or assembly revision. In the intended FreeCAD preview, assemble reusable components; the visible result is an updated assembly state with affected relationships highlighted. Review fit, motion, access and clearance before accepting or exporting it.
Create a technical drawing
Start from the reviewed model and release properties. In the intended FreeCAD preview, create a technical drawing; the visible result is a drawing, bill of materials or model definition tied to that revision. Review dimensions, revision identity and downstream completeness before accepting or exporting it.