Factorio: Skylines. Adds citizens to the game. Attract various castes to your city in order to progress the game.
Large total conversion mods.
Furnaces, assembling machines, production chains.
The mod is great! Even considering its 0.1 version it works fine, no bugs, endgame is reachable and its really fun to play factorio-city-feeder, I'd wish it wasnt abandoned and hope author will be back, eventually.