GIMP is a freely distributed program for such tasks as photo retouching, image composition and image authoring. Almost as powerful as “Photoshop” but without the high price .
It has many capabilities. It can be used as a simple paint program, an expert quality photo retouching program, an online batch processing system, a mass production image renderer, an image format converter, etc.
GIMP is an acronym for GNU Image Manipulation Program.