Darktable is a virtual lighttable and darkroom for photographers. It manages your digital negatives in a database and lets you view them through a zoomable lighttable. It also enables you to develop raw images and enhance them. This project tries to fill the gap between the many excellent existing free raw converters and image management tools (such as ufraw or f-spot). To run darktable, your processor must support SSE2 instructions (i.e. Pentium 4 or higher, or Athlon 64 or higher). The following are optional dependencies: GraphicsMagick - for importing a wide range of non-RAW image formats openjpeg - for exporting images in JPEG 2000 format flickcurl - for exporting images to Flickr json-glib - for exporting images to Facebook If you have nVidia or AMD/ATI graphics with more than 1Gb of memory, either nvidia-driver or amd-app-sdk is an optional runtime dependency. Darktable will then detect and use the OpenCL capability of your graphics hardware for faster processing. See the Darktable User Manual, Chapter 7 Section 2, for more details (in particular, be sure to read it if you have AMD/ATI graphics).