FreeCAD & OpenSCAD have both been mentioned a lot in this thread. If you like the thought of the scripting power OpenSCAD gives you, but like the convenience of

FreeCAD & OpenSCAD have both been mentioned a lot in this thread. If you like the thought of the scripting power OpenSCAD gives you, but like the convenience of a GUI at times, the cadquery plugin for FreeCAD may be worth a look. It provides a Python scripting environment in FreeCAD that you can use in tandem with GUI operations. https://github.com/dcowden/cadquery https://github.com/dcowden/cadquery