For creating models: Blender is tops, openSCAD and Open CAD are good but a lot more technical.
For basic stuff, most slicers have objects and negative connects that you can sculpt I’ve something functional. I made a basic model last week for a thing I needed only in the slicer.
For slicer software: sometimes 3d printer brands customize a more common software to tune it to the specific machine.
I’m a fan of Orca, but Cura and PrusaSlicer are also really good.
For creating models: Blender is tops, openSCAD and Open CAD are good but a lot more technical.
For basic stuff, most slicers have objects and negative connects that you can sculpt I’ve something functional. I made a basic model last week for a thing I needed only in the slicer.
For slicer software: sometimes 3d printer brands customize a more common software to tune it to the specific machine. I’m a fan of Orca, but Cura and PrusaSlicer are also really good.
All of these are available as FOSS on Linux.