GIMP (/ɡɪmp/; an acronym for GNU Image Manipulation Program) is a free and open-source raster graphics editor used for image retouching and editing, free-form drawing, resizing, cropping, photo-montages, converting between different image formats, and more specialized tasks.GIMP began in 1995 as the school project of two university students; now GIMP is a full-fledged application, available on all distributions of Linux, OS X and Microsoft Windows — XP and later versions.