Automated Environmental Systems - Manufacturer of temperature sensors and HVAC products.

Dallas Semiconductor - Makers of a line of digital thermometers.

DigiTemp - Software to read from DS18S20 temperature sensors, and online ordering of assembled sensors.

Enertel - Manufacturing and marketing of energy management electronic controls.

Enerzone - HVAC thermostat control and sensor products.

HVAC/R Sites - Guide to HVAC (heating & AC) resources on the web.

Residential Control Systems (RCS) - HVAC devices including communicating thermostats, HVAC zone control, motorized dampers, and multi-channel relay controls.

Therm Project - Do-it-yourself project for temperature monitoring, with FreeBSD sourcecode.

Wireless Thermostat - A wireless thermostat from RCI Automation.

XCI Corporation - Networked energy management thermostat solutions for the residential, multi-family and commercial industries.