Froogle:
Developed by Google, Inc. One of the most promising price comparison sites to date.
BizRate:
One of the largest price search sites. Over 30 million products listed.
Shopping.com:
Child of Dealtime and Epinions, now merged to provide you with three shopping search engines that feature your products separately, yet the same.
Yahoo Shopping:
Complete Yahoo Shopping data feed creation and maintenance solutions.
MSN Shopping:
Complete MSN Shopping data feed creation and maintenance solutions.
NexTag Shopping:
Complete NexTag data feed creation and maintenance solutions.
PriceGrabber Shopping:
Complete PriceGrabber data feed creation and maintenance solutions.
HouseVanguard.com
Compact tankless water heater of the future at affordable price
SuperHVAC.com
Radiant heating products, boilers, furnaces, water heaters, insulation and indoor air quality. Lines include Kitec pipe, Bock, NTI, Nu-Air.
Modern Solutions Inc.
Energy efficient products and home automation including tankless water heaters. Their goal is to take the fear out of buying new technology.