Comment by _0xdd

Darktable. It has a hell of a learning curve, but it's one hell of a powerful raw editor with some really cool masking features. It has a reputation for being difficult to learn, but the newest release bundles a new tone mapper (AgX) that requires a whole lot less massaging than the old Filmic (and, to a lesser extent, the later Sigmoid mapper). I'm back to managing my photo libraries using plain old files and folders, and syncing them to my NAS using Syncthing. I couldn't be happier, and it doesn't cost me a dime.