Pretty good app for us bargain hunters... maybe with this more posts will be up!
Comparison is audited in real time.
InvisibleHand discreetly notifies you if the product youre browsing is available more cheaply from another retailer. The notification provides a convenient link straight to the relevant product page on the competing retailers website.
InvisibleHand supports over 100 retailers in US, UK and Germany. Support for Canadian retailers is coming soon.
This money saving extension gets its name from the 18th century economist Adam Smith's concept of the invisible hand of the market. Smith didn't have Google Chrome to help prove his point, but we hope he would approve.
Starting from version 0.1.4 InvisibleHand shows notifications when you perform product searches on Google. You can disable this in the options.
InvisibleHand is also available for Firefox from: https://addons.mozilla.org/en-US/firefox/addon/11377?src=external-chromegallery
InvisibleHand helps you to save money while shopping online by doing price comparison for you and automatically notifies you of the best bargains and deals on the web. All prices are checked and compared in real-time.
(Extract taken from link posted - link for firefox users...)