ecobee - The smarter wi-fi thermostat
Nest Thermostat (3rd gen) - A slimmer, sharper, sexier thermostat
Netatmo - Control your heating wherever you are
Zen Thermostat - Control the temperature of your home anytime, from anywhere
ecobee4 - Smart thermostat with Alexa built inside
Honeywell Lyric - think Nest's infamous Learning Thermostat, but smarter