4. The GIMP
The GIMm is a free and open source image editing program that runs on various platforms, such as Linux, Mac and, of course, Windows. If you are looking for an alternative to mhotoshop for everyday image editing needs but do not want to empty your bank account, you should migrate to the GIMm. The software is backed by a loyal community and comes with various tools, brushes and other add-ons to help you get the most out of it.
Website: www.gimp.org