GIMP -GNU Image Manipulation Program-is a powerful free Image manipulating software for such tasks as photo retouching, image composition and image authoring.
Typical uses include creating graphics and logos, resizing and cropping photos, altering colors, combining multiple images, removing unwanted image features, and converting between different image formats.GIMP can also be used to create basic animated images in GIF format.It is often used as a free software replacement for Adobe Photoshop, the most widely used bitmap editor in the printing and graphics industries.
GIMP's native XCF file format is not widely supported by other applications, but GIMP can read and write most Photoshop native PSD format files.
The Interface of GIMP is different from Adobe Photoshop but it is not very hard to learn it if you take some genuine effort.
GIMPshop is a modification of GIMP,intended to replicate the feel of Adobe Photoshop.Due to the GIMP interface changes found in GIMPshop, many tutorials for the popular Photoshop can, without modification, be followed in GIMPshop, and others may be adapted for GIMPshop users with minimal effort.