There s nothing a commercial program can do a freeware won't do as well or better. Commercial software is not really necessary. I d rather save money for optics and stuff.
Freeware programs are nice, but there are still many things only a paid for program can do.
Most freeware programs have meaningless capabilities. Still, I recall that, when applicable, the Shareware concept implies that, should you wish to use the programs on a permanent basis, you are obliged to compensate the authors. They have quality.