It really depends on your needs. 3D printing community is very satisfied with FreeCAD, and GIMP is great for my needs when I need to find a way to increase visibility of some features in drone images and than make python script to repet it hundreds of times. No way I could do it in in PS. Making it run under wine already takes too much time.

And it is not only about money for license but about freedom.

I always see coments like this, and while I appreciate sharing of experience it is just being boring. At least add something specific and don't be a bot.