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.
Although a set of nine Hald CLUT files I use with digiKam and sell on Gumroad serves me well, I recently expanded it to include three new additions: Dial down, Nightcap, and Tilted orange. You can find descriptions and examples of these and other presets on the Hald CLUT Pack page. And you can try any of the presets on your own photos using Lilut.
Below are examples of the presets in action (all photos are taken by yours truly).
If you like the presets, you can buy them on Gumroad. Use this link to get 10% off the regular price.