I find Blender to be the best go to for that sort of thing. That it will do nearly everything can be intimidating, but if you focus on your need it is not so bad, and as your need expands Blender will remain the best go to. There will also be the protection from it ever doing asOnShape and others (Linden labs) have done in changing the rules after you are already committed. It would not surprise me if it became another fad.