GIMP

For several years now, GIMP (GNU Image Manipulation Program) has been one of the best free alternatives to commercial image editors like Photoshop and Corel Draw. It's a free and open-source multiplatform app that lets you do almost the same things you would do on a paid software. You can use GIMP to edit images and to create new ones. It has a brush, pencil, clone stamp, and an airbrush, amon...