darktable is an amazing software to deal with raw files taken from various camera.
Here is the description I get from README.md file inside the source directory:
darktable is an open source photography workflow application and RAW developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.
Certainly there is a simple way to install darktable that is by using apt-get once you added the PPA. More information about that can be read from here.
Currently the PPA will give you darktable 1.4.2 which I found to be OK but I simply need to test the latest, hoping for some fixes or UI changes and new feature. The version 1.4.2 was working fine with some hiccups here and there. The latest one seems faster with no hiccups, couldn’t notice any UI changes though. At the moment, compiling from source get me darktable 1.5.1+68~ge99de72.