GIMP Portable is the popular the GIMP for Windows image editor packaged as a portable app, so you can take your images with you and do your editing on the go.
The GIMP (GNU Image Manipulation Program) is a freely distributed program for such tasks as photo retouching, image composition and image authoring. 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.
