Free raw image processing software

Darktable (stylized as darktable) is a free and open-source photography application and raw developer. Rather than being a raster graphics editor like Adobe Photoshop or GIMP, it comprises a subset of image editing operations specifically aimed at non-destructive raw image post-production. It is primarily focused on improving a photographer's workflow by facilitating the handling of large numbers of images. It is freely available in versions tailored for most major Linux distributions, macOS, Solaris and Windows and is released under the GPL-3.0-or-later software license.

RawTherapee is a free and open source application for processing photographs in raw image formats such as those created by many digital cameras. It comprises a subset of image editing operations specifically aimed at non-destructive post-production of raw photos and is primarily focused on improving a photographer's workflow by facilitating the handling of large numbers of images. It is notable for the advanced control it gives the user over the demosaicing and developing process. It is cross-platform, with versions for Microsoft Windows, macOS and Linux.

dcraw is an open-source computer program which is able to read numerous raw image format files, typically produced by mid-range and high-end digital cameras. dcraw converts these images into the standard TIFF and PPM image formats. This conversion is sometimes referred to as developing a raw image (by analogy with the process of film development) since it renders raw image sensor data (a "digital negative") into a viewable form.

UFRaw (originally named after its founder '''Udi Fuchs's Raw, the backronym Unidentified Flying Raw''' replaced it as the full name) is an application which can read and manipulate photographs in raw image formats, as created by many digital cameras. UFRaw is available as both as a stand-alone program and as a plugin for GIMP (only on non-Microsoft Windows systems). As a stand-alone program, UFRaw can be invoked with a graphical interface, or as a command line batch processing utility.

Rawstudio is a free and open source stand-alone application software to read and manipulate images in raw image formats from digital cameras. It is designed for working rapidly with a large volume of images, whereas similar tools are designed to work with one image at a time.