Finally, a barcode-scanning app that works like a charm. For a mere $1.99 at the App Store, RedLaser, an application developed by Occipital, turns any iPhone into a functional barcode scanner.

All you have to do is open the app and snap a still picture of a product's barcode. Once Red Laser reads the data, it lets you do all kinds of neat things: Compare prices online, beam movies to your TiVo, add items to your grocery list, and so on.

We know what you're thinking: But I'm a marketer, man. How can I use this for plugging my wares?

First, try RedLaser and see if you dig it. If the answer is yes, here's happy news: RedLaser is opening its technology to developers, which means the magic of its barcode-scanning capabilities is yours for the using. Check out its Custom Apps store to see what other companies have done. Examples:

• GoodGuide uses it to help people gauge the environmental/biological friendliness of items they're buying.
• BookFinder guides users to literary delights.

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