darktable - is created for photographers, by photographers.
Having developers that are also avid photographers as part of the target audience is good for understanding the real world problems, challenges, and workflows.
darktable is a photography workflow application and raw developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.
darktable edits your images non-destructively all the way through its pipeline. Your original image is never modified! Professional color management features ensure fidelity all the way to print and GPU accelerated processing means you can speed up your workflow using your video card.
Currently darktable contains 61 image operation modules. Many modules support powerful blending operators offering blend functionality that works on the incoming image information and the output of the current module or be used with drawn masks.
• Basic image operations
• Tone image operations
• Color image operations
• Correction modules
• Effects/artistic image postprocessing