Radio Thermostat Company of america, with one of their branded from 3m, etc. Otherwise, there is the Our Home Spaces radio for the RTCOA, but only has a iPhone app for that radio. Android app's are coming about, but for most items, they just need to be written.
For the radio that comes with the rtcoa thermostat, a lot of people have been rolling their own application, since they put out the information needed to be able to do that. There has been some mixed feelings on that particular thermostat though from a wide range of people.
Prophilix is a good one, ecobee is also, but to get the remote sensors for that one, you have to have a licensed installer get it. There is also the IAQ from Honeywell.