2D/3D, mostly AutoCAD compatible:
Dassault DraftSight:
Graebert Ares Commander (there is Linux version too):
https://www.graebert.com/cad-software/ares-commander/
Bricsys BricsCAD (there is or was Linux version too):
Monstrous 3D CAD system, on league of its own - Dassault Catia:
https://www.3ds.com/products/catia
Architectural - Graphisoft Archicad:
https://graphisoft.com/solutions/archicad/
Architectural, engineering - Nemetschek Allplan:
Freecad seems like it is under pretty consistent development. It is open source.
https://www.freecad.org/
I have designed multiple things with it.
Definitely not perfect, probably would have a difficult time in a commercial setting, but in the past 5 years has gotten a whole lot better!
It is kind of GIMP right now, I hope it gets to be like Blender as far as user experience.
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I’ll be getting my 3D-printer soon, and I plan on learning FreeCAD for that purpose!
Very rewarding use case.