Pixelmator updated its image editor on Thursday with a smart Quick Selection tool, a Magnetic Selection tool, and a full set of retouching tools, among other things. There are also a host of improvements and bug fixes in the new version. Pixelmator also put together some new resources for users including: Pixelmator Retouch Extension Page, Magnetic Selection Video, and a New Pixelmator Tutorial Page.
This is one of my favorite apps.