Also FreeCAD has a gcode workbench for full 3D. I've used it a little and would describe it as "usable once you work out the quirks". Https://freecadweb.org/. - Source: Reddit / 2 months ago
SketchUp - 3D for Everyone
DraftSight - Discover Dassault Systèmes®' DRAFTSIGHT™ Professional CAD software that lets you create, edit, view and markup any kind of 2D drawing. Learn more here.
LibreCAD - An open source 2D CAD application for Windows, Apple and Linux.
MicroStation - 3D CAD modelling software for architecture and engineering.
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