almost 3 years ago - Crater Creator - Direct link
Nitrogen only makes new maps as far as I’m aware, and the community is moving to a newer tool called KingGen anyway.
https://community.7daystodie.com/topic/23988-kinggen-a-random-world-generator-for-7-days-to-die/

There are other types of mods, but to add new buildings, you’re changing the world, so it’s like seven said.