To paraphrase Sir Mix-A-Lot, I like Hald CLUTs, and I cannot lie. Indeed a handful of Hald CLUT files made with my own fair hands is a staple of my photography workflow. Hald WHAT? you might ask. To oversimplify, it's a preset that any Hald CLUT-capable application (digiKam, RawTherapee, and Darktable, to name a few) can use to apply a specific look to a photo. Here's a much better and more detailed explanation if you want to know more.