GIMP (short for the GNU Image Manipulation Program) is a free software raster graphics editor. It is primarily employed as an image retouching and editing tool.
GIMP (short for the GNU Image Manipulation Program) is a free software raster graphics editor (with some (limited) support for importing vector graphics). It is primarily employed as an image retouching and editing tool, as well as a production environment for artists. It is a powerful alternative/replacement for Adobe's Photoshop, and able to stand out on its own.
See here for more: http://en.wikipedia.org/wiki/GIMP