Nest Thermostat (3rd gen) - A slimmer, sharper, sexier thermostat
Honeywell Lyric - think Nest's infamous Learning Thermostat, but smarter
Netatmo - Control your heating wherever you are
ecobee - The smarter wi-fi thermostat
ecobee4 - Smart thermostat with Alexa built inside
Vivint Element Smart Thermostat - A smart wireless thermostat that blends comfort and savings