Krita is not a household name, but all aritsts who use linux know about it, which, to be fair, is not a lot of people. It’s free, the interface is great, and it has all of the tools and brushes other popular digital art software programs do, but at no cost and with the perk of extra privacy. I’m surprised that nobody has left a review here yet, maybe the Krita community have to do a better job at promoting the platform