Low-energy wireless beacons for close proximity content delivery, namely, transceivers; Low-energy wireless beacons, namely, transmitters of wireless networking signals; Radio frequency identification (RFID) tags; Radio-frequency identification (RFID) readers; Computer software, mobile phone software, and computer hardware for interacting with low-energy wireless beacons, for wireless content delivery, and for development of software related to low-energy wireless beacons, radio frequency identification (RFID) tags and readers, and contextually aware applications; downloadable computer software in the nature of a mobile application for use in contextually aware applications