This document provides a list of 15 websites where 3D families can be downloaded for BIM models. Some of the sites mentioned for finding families include National BIM Library, Bimstore, Bimobject, Modlar, 3D Library, SpecifiedBy, Familit, RevitCity, Arcat, SmartBIM Library, Bimetica, BIM Catalogs, Polantis Objects, and BIMBox Library.