From GIMP's website: "This is only a very quickly thrown together list of GIMP features. This is only the tip of the iceberg. * Full suite of painting tools including Brush, Pencil, Airbrush, Clone,etc. * Tile based memory managent so image size is limited only by available disk space. * Sub-pixel sampling for all paint tools for high quality anti-aliasing * Full alpha channel support * Layers and channels * A Procedural Database for calling internal GIMP...