The GNU Image Manipulation Program (GIMP) is a free piece of software available for Windows, Mac and Linux Operating systems for tasks such as photo retouching, image composition and image authoring. If you don’t want to pay for Photoshop, it is a viable alternative. It is similiar to Snipping Tool but better. Check out the URL link:
Free Tutorial URL link:
http://tutorialblog.org/gimp-tutorials/
Thanks to my classmate who provide the information regarding GIMP.
Technology for K12 