MySimon - The unbiased site for comparison shopping on the Internet. Shoppers compare millions of products from over 1000 merchants in categories like books, music, movies, apparel, computers, electronics, toys, sporting goods, gourmet foods and wines.
Consumer Information Center - Catalog of free and low-cost federal publications of consumer interest
Consumer World - Over 1800 links to everything 'consumer' on the Internet, including product reviews, buying advice, consumer rights, scam alerts and bargains.