Sim Settlements Mod
MODSettlers should build their own damn houses (and farms, and shops, and...), you've got a Commonwealth to explore!
In version 1.0, this mod adds the start of that vision by allowing you to place down zones (ala Sim City) that will make your settlers create buildings of the appropriate type in that zone.
The authors of that have declared they are not supporting the Non-DLC version, so I can't either.