GIMP - GNU Image Manipulation Program

The GIMP is the GNU Image Manipulation Program. It is a freely distributed piece of software for such tasks as photo retouching, image composition and image authoring. It works on many operating systems, in many languages. Compiled versions available for Windows, Mac OSX and Linux as well as the full source code. GIMP developers are proud to release version 2.6 of the GIMP, the leading free software tool for image manipulation. This release is a major event, marking the end of a three year development cycle by a group of volunteers and enthusiasts who have made this the most professional release of the GIMP ever. It is the first stable release that is officially supported not only on Unix-based operating systems, but also on Microsoft Windows and Macintosh OS X. "When you launch version 2.0 you'll see a new look that's a huge improvement over the previous version's mundane and purely functional interface. The new design not only provides a polished and comfortable feel, it is also far more intuitive and friendly than its predecessor.
GIMP - GNU Image Manipulation Program