Gimp - Photo Editing and Graphic Design

Gimp aka GIMPshop is an open-source competitor to Adobe Photoshop. This is a very powerful image editing tool. I actually found basic editing to be much easier than on Photoshop. Just like it's expensive counterpart, there are tons of tutorials, help, and add-ons for it.
Compare to photoshop, paintshop pro, adobe, digital image suite, paint.net, go photo free software