The features in RawTherapee, and even its interface, are similar to those of Adobe Lightroom. This tool is compatible with most formats for DSLR cameras (such as NEF, DNG, among others), and also supports the traditional formats like JPG and TIFF. RawTherapee is a photo editor that's specially designed to work with RAW files.Although it’s open-source software, RawTherapee supports most common RAW file formats, including those from Pentax and Sony. It provides high-quality images with high dynamic range and uses state-of-the-art demosaicing algorithms. 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.
RawTherapee is a free RAW photo editor for Windows, Mac, and Linux. RawTherapee is a powerful, cross-platform raw photo processing system, released as Free Software (GPLv3). RawTherapee alternatives are mainly Raw Photo Processors but. Other great apps like RawTherapee are darktable, Adobe Lightroom, Shotwell and Polarr.
The best alternative is digiKam, which is both free and Open Source. RawTherapee is a powerful, cross-platform raw photo processing system, released as Free Software. There are more than 25 alternatives to RawTherapee for a variety of platforms, including Windows, Mac, Linux, iPhone and iPad.