@rek Darktable is quite good in my opinion.

@rek Dark table does the job, but it was definitely a bit painful making the switch from Lightroom.

@rek i was just talking about this with @raelzero yesterday!! he shoots a decent amount and uses ART (hilarious name imo)

https://bitbucket.org/agriggio/art/wiki/Home

@rek I am pretty happy with Darktable (but as a non professionnal photographer)

@rek I've been using darktable too for a couple years and it's pretty good!

@rek Another vote for Darktable. Here's a screenshot so you can see there's similarities with lightroom UI (at least the version I remember from years ago). There's a lot of features, but honestly after learning 5% of it, I've found it meeting my needs, and usable.

Thank you everyone for the suggestions :), I think I've got what I need!

@rek I tried Darktable a few months ago and nope'd out of learning the UI. It did seem like it would be able to do the job, though.

Other options include ACDSee (I used to work there, in fact, and used the software a decent amount before switching to Lightroom), and Pixelmator (which I haven't used).