As someone who dabbles in both photography and graphic design, I spend a lot of time in graphics-oriented apps. There are several leading apps in this category, and this comparison is meant to help you chose which one is the best for you.
The free one. GIMP is free, open source, and cross platform. It has a reasonably good feature set, but doesn’t perform particularly admirably and has a user experience that is decidedly un-Mac-like.
GIMP is free.
The big one. Photoshop has been around for a long time, and is the industry standard. Photoshop is the archetypical ‘professional’ …