So, if you have plugged in a camera that only includes RAW images (yikes! :P) then this is a very powerful tool that can save your day! :).
*. Images processing in 16 bit channel mode.
*. Supports high performance demosaicing algorithms (EAHD and HPHD and VNG-4).
*. Crop, re-size, enhance, etc... has a lot of tools out of the box!.
*. Supports various formats such as JPEG, BMP, TIFF.
*. Thumbnail previews of RAW images.
*. Advanced color management... are just a very few to mention.
If you use Ubuntu and want to give it a try, then open your Terminal and enter the below command to install RawTherapee.
sudo add-apt-repository ppa:rawtherapee/ppa
sudo aptitude update
sudo aptitude install rawtherapee