65
A GIMP Guide, but from a Photoshop User
(www.youtube.com)
If it's free and open source and it's also software, it can be discussed here. Subcommunity of Technology.
This community's icon was made by Aaron Schneider, under the CC-BY-NC-SA 4.0 license.
If you haven't already, give RawTherapee a try. I can't compare it to Lightroom, but I find it a lot easier to use than Darktable.