Blender is a powerful, free, and open-source 3D creation suite that can be effectively used for Computer-Aided Design (CAD) through the use of specialized add-ons. While it is fundamentally a mesh-based modeler rather than a traditional parametric CAD program, its flexibility makes it a favorite for architectural visualization, product prototyping, and 3D printing.
To get started with Blender for CAD work, you must first download the base software from the official site. blender cad free download