FreeCAD (opens in new tab)

FreeCAD is an open-source parametric 3D modeler built to help you design real-world objects of any size. With parametric modeling, you can easily modify your designs by adjusting parameters in the model history. FreeCAD is suitable for a wide range of uses, from product design and mechanical engineering to architecture and 3D printing. The software allows you to create constrained 2D sketches, which can be used as the basis for more complex 3D models. It includes tools to adjust dimensions, e...