GIMP
The GNU Image Manipulation Program (GIMP) is a graphics program used to crop, resize, and edit images. It can be installed on the Windows, Mac, and Linux operating systems.
GIMP is very much similar to Adobe Photoshop and completely free to use. It even supports over 100 plugins to extend its functionalities. It functions as an image format converter, a mass-production picture renderer, an online batch processing system, and a photo editing tool.
