Darktable Rating: 4.5 out of 5 stars
OS X users have a few options for processing their RAW files, including commercial applications in the form of Adobe Lightroom and Apple’s own Aperture, and some other free applications, such as Lightzone and Photivo. Linux users also have the option of Lightzone and Photivo. Windows users can use Lightroom and Corel Aftershot, as well as a slew of others.
Interestingly, Darktable also supports tethered shooting so you can connect a compatible camera and see a live view on screen as well as review your images immediately after shooting them on a large screen. This, though, is a relatively specialist application that will probably only be of interest to a minority of users, so it's not a feature that we will concentrate on.