virtualStudio, yet another free graphics program (you cannot have too many).
http://www.optikvervelabs.com/
"Want a quick alternative to opening your complex imaging application each time you want to apply artistic effects to a photo?
We make it easy to use virtualPhotographer and other popular plug-ins with virtualStudio, a full-featured digital photo editor. virtualStudio allows you to open and save over 30 file formats including jpg, jpeg2000, png, bmp, gif, tiff, psd and some RAW files."