If you’re using Win8 yet, no doubt you’ve run into the charms bar. There’s a feature to extend via Share, links to your application.
Details on the HOW are here:
So, Digital Folio has taken their shopping tool to Win8 and enabled some really cool ways to take advantage. I was fortunate enough to help out the folks there a while back on some other things, but their app is a nice shoppers aid.
Digital Folio for Windows 8 | Instant Price Comparisons from Major Retailers on the Products You Want