Raw image processing program
RawTherapee is a cross-platform raw image processing program, released under the GNU General Public License Version 3. It was originally written by Gábor Horváth of Budapest, and development was taken over in 2010 by a team of people from around the world. Rather than being a raster graphics editor such as Photoshop or GIMP or a digital asset management program like digiKam, it is specifically aimed at raw photo post-production. And it does it very well - at a minimum, RawTherapee is one of the most powerful raw processing programs available.