I thought it might be nice to set up a thread in which we can recommend game systems to one another. What do you like? Why? Give us a quick blurb about a game you like and why you think others might like it. Maybe call out if you think it would be good for absolute beginners or folks new to the OSR/NSR. Oh and the genre too. If this gains some steam, I’ll pin it to the sidebar for easy access.
Seconding the X Without Numbers series. I don’t even play Worlds Without Number but it’s a goldmine of tools for sandbox campaign-building for an OSR D&D game. Cities Without Numbers is shaping up pretty well too. I’d certainly rather play that than try to wrap my head around the Shadowrun system.
They all have free versions too, which is nice.