InvisibleHand is a Firefox, Google Chrome and Safari add-on that will automatically find the lowest price on your desired products.
InvisibleHand's working mechanism consists basically in automatically checking for better prices and periodically showing a discreet notification when you're browsing a product which is cheaper at another retailer.
InvisibleHand currently supports more than 50 of US and UK retailers.
The InvisibleHand add-on is cross-platform and it works on Mac OS X, Windows and Linux.
Requirements:
· Firefox 3.5 - 12.0a1 or
· Google Chrome or
· Safari 5.0.1 or later
What's New in This Release: [ read full changelog ]
· Minor bug fixes