Bluetooth For short range direct wireless connections between smart phones, computers, laptops and other devices
Tethering Connecting two devices using a physical cable in order to share a network or data connection between them
NFC Often used for payments but can have other use cases. Requires proximity and line of site for devices to share data wirelessly.
Z-Wave Proprietary wireless standard that creates a mesh of wireless devices for sharing information. Often used in home automation networks.
ZigBee An open standard based on IEEE 802.15.4 PAN that creates a mesh of wireless devices for sharing information. Often used in home automation networks.