Gabor Horvath and an open source dev team

For me is an awesome open-source solution for processing RAW files. Great and extensive array of features. It has a unique processing pipeline so that's a plus.

The ability to upload and correct/edit my photos all at an instant.

The biggest advantage is fact than this software is total free. Despite this, it is also very functional. It have all functions I need to bust look of my photos which I need in documentation. Processing raw file works very good. I believe that the operation of the program on the linux system is a very big advantage.