How to fix Lost layers, Tool Options and Docks in GIMP
pixelmove.com
How to make your layers show in GIMP. Also tells you how to get Tool Options and Docks back. GIMP interface tutorial.
You can get GIMP here http://www.gimp.org
If you prefer GIMP portable watch this: http://www.youtube.com/watch?v=AeoL4DPYmU8