I'm playing a campaign that's LotFP plus slot based encumbrance house rules, and I've been disappointed in a lot of hexcrawling rulesets I've seen from the OSR. I particularly don't like Black Hack type usage dice / the Necropraxis overloaded encounter die, and that seems to be where thought has coalesced, with Errant being an example of a game that goes all in on that.
So I was delighted to discover that 1e AD&D has a supplement with workable mechanics for temperature (including wind chill!), foraging, hunting, etc. I need to massage it a little to fit into the LotFP skills system because it comes with its own but on the whole I'm excited that I have a way to go inside hexes and give players meaningful decisions about how they dress, where they camp, etc.
What about y'all, what material have you been reading recently?
Mostly re-reading Classic Traveller 3 little black books from 1977. Amazing how much of a complete game is there and yet an open framework for implementing just about any sci-fi setting you can imagine. That is, if you're willing to do the work that 1977 RPGs expected from referees. Definitely not an "open and just run table procedures" type of game!