RawTherapee is a powerful, cross-platform raw photo processing system, released as Free Software (GPLv3). It is designed for developing raw files from a broad range of digital cameras and targeted at users ranging from enthusiast newcomers who wish to broaden their understanding of how digital imaging works to professional photographers.
Linux, MAC, Windows
Ease of Use:
Scale of 1 to 5; 1 being easiest, 5 being hardest