Regarding that matter, Adobe Photoshop will be score 10, while GIMP will be score 7.
GIMP is a good way to Manipulate Images with no cost. Although, you have to buy Adobe Photoshop, some people do it the other way. I can't say it in this Forum for some reasons. But, for the people who don't know how to do it, they install GIMP. GIMP is not the best Image Manipulation Software, but for cheap people like me, its alright.