Blender - Blender is the open source, cross platform suite of tools for 3D creation.
LinuxCNC (the Enhanced Machine Control) - LinuxCNC: an open source CNC machine controller. It can drive milling machines, lathes, 3d printers, laser cutters, plasma cutters, robot arms, hexapods, and more.
FreeCAD - An open-source parametric 3D modeler
Vectric Aspire - The complete software solution for CNC Routing,
Sculptris - Sculptris: Enter a world of digital art without barriers.
Mastercam - Mastercam's Dynamic Milling is a game changer for us.