Overall, there are few apps that can make a novice graphics hobbyist look like a professional design artist, but Photoshop is one that can. If you can afford it, Photoshop will do wonders for your digital photography, Web graphics, and/or print media needs. And for the high-end Web developer, no combination of tools will allow you to create great-looking Web sites like Photoshop and ImageReady.
Pros: Unrivaled graphics design tools, special effects & filters, intuitive and easy to use
Cons: Quite expensive at $649 (especially for individuals/small businesses)