Look Who’s Stalking: 10 Creepiest Apps For Phones, Facebook, More
Previously shown off at Mobile World Congress 2010 in Barcelona, Recognizr lets you point your smartphone camera at somebody's face, after which their contact info and social network updates pop up. If this app had been made freely available, millions of virtual eyes might be stowed away in every mobile phone owner's pockets.
Is the app useful? Moderately. Scary? Absolutely. Thankfully, no working download or demo can be found now.