Chrome extensions for penny pinchers

If you're browsing with Chrome or Chromium (bleeding-edge version), here are two essential online shopping tools:

• Invisible Hand shows you the best price for the item you are looking at. If you are already looking at the best deal, it shows you the next best price. Shop with confidence.
• Shopping Buddy notifies you about Google Checkout deals offered by the e-store you are visiting and lets you see reviews and ratings for the product from the omnibar.