These apps are probably the 7 Best Augmented Reality Apps, you can judge for yourself.
Uses the iPhone’s cam and compass to place Yelp ratings over a live view of establishments. Ideal for identifying five-star dive bars and avoiding bourgie bistros.
Streams Google maps from your iPhone to a special eyepiece you mount on your bike helmet. Now you’ll always know where you’re going. (Into a parked car?)
Look through your phone’s camera and TwittARound shows you location-stamped tweets (available from certain Twitter clients) from others nearby.
One Roman ruin looks pretty much like any other after a long day of sightseeing. Train your phonecam on the rubble to pull up the site’s Wikipedia entry.
Aim the camera on your Android phone at a cityscape and Layar coughs up data — everything from the location of bus stations and skate parks to real estate prices.
Lost in a public-transport labyrinth? (Tokyo commuters, we’re thinking of you.) Acrossair overlays directions and line info on the iPhone’s camera view.
Using face-recognition software from Polar Rose, this app can scan a stranger’s mug and reveal their contact info and profile stats. Creepalicious!