FreeCAD is a parametric 3D modeler made primarily to design real-life objects of any size. Developed by Juergen Riegel, Werner Mayer
License: Open Source
PTC Creo is a powerful, professional-grade CAD solution ideal for complex engineering projects, offering extensive features but at a high cost. In contrast, FreeCAD is an open-source alternative that provides essential modeling tools for beginners and hobbyists, though it may lack some advanced features found in commercial software.