R E K on Nostr: Can anyone recommend an alternative to Adobe's Lightroom for processing raw images? ...

Can anyone recommend an alternative to Adobe's Lightroom for processing raw images?
Ideally, an open-source alternative that won't be too jarring for an avid Lightroom user(asking for a friend). Boosts ok.

(Looking for recommendations from photographers. Plz don't recommend software you have never used yourself. )