MacUpdate is offering Pixelmator at only $29.99, just follow this link. Pixelmator is one of the best alternatives to Adobe’s Photoshop currently available on the Mac, allowing you to retouch your photos and create rich digital compositions in a beautiful and usable user interface. At 30 bucks it’s a steal, and you shouldn’t miss it for any reason.
To learn more about Pixelmator, I suggest you taking a look at the excellent “Pixelmator Learn” page on the official website.