I usually use FreeCAD but lately the constraints solver just feels kinda buggy, crapping out on even fairly simple geometries.
FreeCAD is honestly quite well suited to the 3D modeling I do. Geometrically constructed shapes. Rather utilitarian designs. But it just doesn’t work very well.
What else is there?
Do I need to learn OpenSCAD?


There is also 2 new alternatives, https://dune3d.org/ , and Blender with the CAD-Addon should be good enough for 3D printing.
I haven’t tried them myself though, since I’m very happy with FreeCAD, and FreeCADs rate of development has accelerated enormously in recent years so I’m excited for it’s future.