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 and is freely available in versions tailored for most popular operating systems, including but not limited to Microsoft Corporation's Windows platform, Apple's Mac OS X, and Linux.
In addition to detailed image retouching and free-form drawing, GIMP can accomplish essential image editing tasks such as resizing, editing, and cropping photos, photomontages combining multiple images, and converting between different image formats. GIMP can also be used to create basic animated images in the GIF format. With its encyclopedic abilities, GIMP is widely considered to be the main free-software functional drop-in replacement for Adobe Photoshop, with a similar feature set and a similar and complex user interface.
The original product vision for GIMP, now fully realized, was that of an entirely free high-end graphics application for the editing and creation of original images, icons, graphical elements of web pages and art for the user interface elements of free software. Gimp has since also become used by photographers and the film industry. GIMP is sometimes also employed by researchers as a framework for prototyping novel image-processing algorithms, because of its open extensible structure.

