Short bio: Computer Scientist, FOSS supporter (read more)
Tux Machines (TM)-specific
If you are into photo editing and you don’t want to pay for a program that you’ll never use enough to pay for itself, check out GIMP. I’ve been using it for some time now and have learned how to do many of the things I need to for web design work (including image maps). GIMP is free and not all that difficult to learn, as long as you are not afraid of tutorials.
Steven recently wrote an article listing 5 websites that will help you learn GIMP for free. As Steven mentions, there are many articles here on MakeUseOf that provide GIMP photo editing tips (check out the “GIMP” tag), but there are also so many other GIMP photo editing resources out there on the Internet.