Whether you love GIMP (GNU Image Manipulation Program) or hate it, GIMP has a significant presence in IT. It’s affordable and useful for lots of things people do with images.
“GIMP is an amazing image editing software package similar to Adobe Photoshop, but licensed as free and open source. The latest version of GIMP (2.8) has been downloaded over 6.5 Million times in just two months, so this is a huge community of skilled & dedicated users.”
There’s going to be a magazine for professionals using GIMP.