AUTOCAD [COMEERCIAL]
It is the best CAD software ever. The only problem is that the license costs a lot.
https://www.autodesk.com/products/autocad/overview
FREECAD [FREE]
The best cad free software. It can be used for both 2d and 3d modeling.
https://www.freecadweb.org/downloads.php
LIBRECAD
It is the best alternative to freecad but can only be used for 2d
https://librecad.org/#download
SKETCHUP [FREEMIUM]
It’s the google home software. It is a decent software and a valid alternative to blender but it is freemium.
It is a 3D modeling computer program for a wide range of drawing applications such as architectural, interior design, civil and mechanical engineering, film, and video game design
https://www.sketchup.com/plans-and-pricing/sketchup-free
BLENDER [FREE]
Blender is the free open source 3D content creation suite, available for all major operating systems under the GNU General Public License. It can be used for modeling, UV unwrapping, texturing, rigging, water simulations, skinning, animating, rendering, particle and other simulations, non-linear editing, compositing, and creating interactive 3D applications, rigid body, fluid, cloth and softbody dynamics, modifier based modeling tools, powerful character animation tools, a node based material and compositing system and Python for embedded scripting.