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
IronCAD is a commercial CAD software that offers a user-friendly interface and powerful rendering capabilities, making it suitable for users who require strong 3D modeling and visualization tools. FreeCAD, being an open-source alternative, excels in parametric modeling and customization, making it ideal for users who need flexibility and scripting support.