Gizmodo published a gallery of some of the worst gadgets ever, you can check it out over here. One of the products that made the list is the CueCat:
If you subscribed to a magazine in 2000, there was a decent chance you were sent a CueCat, and an even better chance you never used it. The CueCat was a barcode scanner that you plugged into your computer. The idea was that users would scan ads in magazines and thus be shepherded magically to the advertiser's website. If it sounds like a needlessly cumbersome way to use the Internet, that's because it is! Fortunately, the CueCat was put down for good in 2001.