InvisibleHand is a Firefox, Google Chrome, Opera and Safari add-on that will automatically find the lowest price on your desired products.
InvisibleHand automatically checks for better prices and periodically showing a discreet notification when you're browsing a product which is cheaper at another retailer.
Additionally, InvisibleHand currently supports more than 580 US, UK and German retailers and over 589 airlines.
The InvisibleHand add-on is cross-platform and it works on Mac OS X, Windows and Linux.
· Firefox 3.5 and later or
· Google Chrome or
· Safari 5.0.1 or later or
What's New in This Release: [ read full changelog ]
· Major product-matching upgrade
· Performance improvements
· Minor bug fixes