While this post is a little late for Christmas, shopping never goes out of style and neither does getting a good deal. InvisibleHand is one of those tools that can save you money while you are browsing the internet.

InvisibleHand is a browser plug-in for Apple Safari, Google Chrome, Microsoft Internet Explorer, and Mozilla Firefox. It also works on Windows, OS X and Linux. If you are on a site that has pricing for a product, InvisibleHand will start working in the background and if it finds pricing from other web sites it will notify you how your current site compares.

Here is an example of a search on Amazon for a Canon PowerShot S95 camera. InvisibleHand found 14 other retailers selling the camera and determined that you could buy it from Best Buy for $29.01 cheaper.

And here is the list of alternatives.

Keep in mind it is still up to you to determine the best price since the listed prices may not include shipping and taxes. Sometimes shipping can make a huge difference. You will also want to make sure that comparisons are truly equal and that there isn’t something else included or excluded. Notice how the prices on this camera varied over $200 from the cheapest price to the most expensive and you can see how this little plug-in can start saving you money today.