GNU Image Manipulator is the full form of GIMP and is a free space image editing elucidator that undergoes the field of comparable open-source programs. Overall, the software is a force to reckon with among the best free image editing applications, and the ideal package for geek photographers who like to keep their editing space under control. You can use pre-installed and downloadable plugins just as Photoshop. GIMP has loads of features for the advanced user including filters, Bezier curves, layer masks, and an animation package.