There's a bunch of resources on the darktable website: http://www.darktable.org/resources/ http://www.darktable.org/resources/ The screencasts might be a good

There's a bunch of resources on the darktable website: http://www.darktable.org/resources/ http://www.darktable.org/resources/ The screencasts might be a good place to start, and the user manual is quite comprehensive. Disclaimer: I did some of the screencasts. Riley's course is a more-complete overview, but it's not free. Also keep in mind that darktable just entered feature freeze for 2.0, should be released around the end of the year.