FreeCAD is a powerful and flexible open-source 3D CAD modeling platform designed for mechanical engineering, product design, architecture, and beyond. Built to be highly modular and extensible, FreeCAD offers parametric modeling, a robust suite of tools, and support for multiple file formats—all without licensing costs. Whether you’re creating technical parts, architectural plans, or 3D printable models, FreeCAD gives you the freedom and control to bring your ideas to life.