Downloadable software for enabling users to identify and communicate with persons to facilitate and enable access to homes, garages, buildings, dwellings, and residences; downloadable software for enabling users to identify and communicate with persons to facilitate and enable access to homes, garages, buildings, dwellings, and residences using near field communication (NFC) technology; downloadable software for enabling users to control, manage, monitor, and permit access to homes, garages, ...