Darktable

darktable is a photography workflow application and RAW developer. It simplifies managing large numbers of RAW photos and their post-production in a non-destructive manner.

Config
Basic settings can be altered in.

Utilities
The package provides a few additional tools.

darktable-cli
Using it is possible to use darktable for a non-interactive batch processing and export.

darktable-cmstest
helps debugging color management issues (eg. exported photo colors don't match the darktable's). Also it indicates whether the colord USE flag was enabled.

darktable-cltest
Darktable with enabled opencl USE flag supports OpenCL-based GPU acceleration. The utility helps debugging the darktable's setup and OpenCL driver interactions.

dt-curve-tool
In order to improve approximation of camera's built-in JPEG engine with the default RAW processing settings you can use the.

External resources

 * dt-curve-tool - manual
 * faq - Official darktable FAQ
 * camera support - List of supported cameras