Want to edit picture in the office but there isn't a licensed copy of PS?
fret not! Here is a free version very simliar to PS!
Presenting GIMP !!
Download the first 2 files.. GTK+ 2.6.4 and GIMP.
I would recommend to download the help file as well but it's optional.
Install GTK+ FIRST then GIMP
You're ready to go! Needs a little getting used to the UI but by and large it should not affect your workflow. It has all the standard screen, multiply, dodge and burn..