Workshop Plus
From Sim Settlements
TLDR: Workshop Framework attempts to open up the settlement system in a way that many mod authors can contribute (and not just coders either! There are tons of things even the greenest mod author can take advantage of). It has immediate benefits to players outlined in the Player Focused Features list below.
If you use the Unofficial Patch - be certain that Workshop Framework comes AFTER it in your load order.
== Player Focused Features ==