FreeCAD is known as a free, open-source parametric CAD modeler that is a great entry point for mechanical engineers who are new to the world of 3D modeling.
The software’s official page presents FreeCAD as made primarily to design real-life objects of any size. Parametric modeling allows you to easily modify your design by going back into your model history and changing its parameters. FreeCAD is open-source and highly customizable, scriptable and extensible.
According to an online review on FreeCAD, this 3D modeling software is most suitable for geometric designs, such as precise technical parts, replacement parts, gadgets, cases, scale models, etc. It’s less suited for creating organic objects such as figurines of humans, animals, or plants.