Price Snoop - When viewing a product on Amazon, Price Snoop will show you just how much it costs on the other...
hopshop.us - hopshop.us evolved from a simple concept - to allow serendipitous discovery of great stores and...
Shoptimate - Use the Shoptimate extensions to compare the price without any click. When you browse an item on a online store, a bar shows up at the top to tell you if the exact same item can be found cheaper elsewhere. Including shipping costs
Shopzilla - Shop smart and shop fast at Shopzilla!
Prisync - Prisync is a competitor price tracking and monitoring software for all sizes of e-commerce companies worldwide.
Invisible Hand - InvisibleHand gets you the lowest price on shopping and flights.