Circon Systems Corp. - Leading-edge developer and manufacturer of products based on LonWorks open systems technology.

Echelon Corp. - The developer of the Lonworks® device networking platform.

Lonmark International - a global membership organization created to promote and advance the business of efficient and effective integration of open, multi-vendor control systems utilizing ANSI/CEA 709.1 and related standards.

Energy Efficiency Education - Information on making buildings efficient.

SMUD Energy Information Library - Lots of information on energy technology in buildings.

Climatemaster Inc. - Manufacturer of water source heat pumps.