CASPIAN: Consumers Against Supermarket Privacy Invasion and Numbering

Consumer group opposed to supermarket "club cards" and loyalty programs. Lists the card status of supermarkets across the U.S.
http://www.nocards.org

Foundation for Taxpayer and Consumer Rights

A nationally-recognized, California-based, non-profit consumer education and advocacy organization. Deals in insurance reform, healthcare reform, billing errors, and other issues.
http://www.consumerwatchdog.org

The Swedish Consumer Coalition

An organisation for consumers and other organisations, who has the goal to increase the influence of the consumers on the market and in the politics.
http://www.konsumentsamverkan.se/english/indexeng.html