GIMP is one of the best free photo editors out there but its not to everyone's liking. That's why SeaShore has been developed as a simpler, easier to use photo editor.
SeaShore is an open source image editor based on GIMP. It features gradients, textures and anti-aliasing for both text and brush strokes. It also supports multiple layers, alpha channel editing and uses the same native file format as GIMP. And due to Cocoa, it sports a much slicker OS X friendly user interface that definitely looks better than GIMP.
The beauty of SeaShore is that it's a lot simpler than GIMP and feels a bit closer to Photoshop in the way the menus are laid out. The downside of this, however, is that it's not as powerful as GIMP and lacks certain advanced editing features. In fact, even basic features such as Color Balance and Levels are missing from SeaShore. Stability can also occasionally be an issue but it usually manages to carry out most functions without any problems.
A slick OS X Cocoa style interface and a simpler GIMP style functionality will make SeaShore popular with anyone who has struggled with GIMP.