Microsoft has introduced revolutionary new technology – Microsoft Tag. Microsoft Tag is new kind of barcode but with much more power. You can print the tag anywhere, or stick it anywhere and use your phone to scan it. Let it be for any advertisements, signage, magazine articles, websites, blogs, videos, reviews, contact information, social networks, discounts, promotions and that list goes on. Once you download the tag to your phone (camera enabled phone) you can scan the tags to get the relevant information. Microsoft Tag supports Windows Phone, iPhone, Android, Symbian S60, Blackberry, and J2ME phones

You can get the details of supported devices: Microsoft Tag Supported Devices.

Microsoft Tag is completely free application.

You can read complete information here: Microsoft Tag Homepage.