"Most people think of Gimp as powerful but difficult. When
viewed from the right mindset, Gimp is incredibly easy. Just think
layers. Lots of layers. If you mess up one layer, just redo it.
"Most Troubleshooters.Com graphics made after March 2001 were
made with Gimp. It's an excellent and highly productive product.
It's free software. This issue of Linux Productivity Magazine is
devoted to making you a Gimp ninja in an hour or so..."