| Software | Best For | Free Tier | Catia Comparable Feature | |----------|---------|-----------|--------------------------| | | Parametric modeling & CAM | Free for hobbyists/students | Surface modeling, assemblies | | FreeCAD | Open-source parametric | Unlimited, full free | Part design, sketcher, techdraw | | Onshape | Cloud CAD (real-time collab) | Free with public files | Complex assemblies, sheet metal | | Blender | Organic surfacing & rendering | Complete free | Not precise but great for concept | | Solid Edge 2D Drafting | 2D to 3D transition | Free perpetually | Drafting and layout |
