Grover - Rent electronics for a month & try it before you buy.
Buycott - Buycott helps you organize your everyday consumer spending to support causes you care about.
Shelf Engine - Vendors get paid for only products they sell
ShopWell - Nutrition expertise in your pocket.
Nespresso Index - The caffeinated version of the Big Mac Index.
ipiit - Scan food products to check for allergens