RawTherapee

RawTherapee is a free, open-source cross-platform raw image processing application. It provides a comprehensive set of non-destructive editing tools for raw files from digital cameras, including exposure adjustment, noise reduction, color correction, and sharpening. The project is community-maintained and supports a wide range of camera raw formats.

Click any badge for full per-format details - what it is, how to open it and how to convert it.