The main task of the mod is to prevent generation of a new NPC, forcing the game for various roles and careers (maid, postman, etc.) to use existing Sims.
The mod settings allow you to adjust the number of NPCs in cities and jungles, manage the number of homeless and sick pets, disable the generation of vampires and aliens, sad clown and bears, and so on. Work on the mod continues, in future versions will add new features and settings.
NPCC MOD installation
Unzip and place .ts4script file into your Mods folder or one level below that e.g. Mods\NPCC.
Script mods must be enabled in your game options for this mod to work properly.