Ok, imagine this: you walk into a room, pull out your iPhone, point it at somebody, and the iPhone shows you an augmented reality overlay of that person's name and their Facebook profile. Pretty amazing, ah?
That may sound like it's straight out of Terminator (well, in Terminator he didn't have Facebook but he did walk into a bar and get onscreen information about the people there) but it's not. In fact it's already available in the app store. AND it's free.
KLIK by Face.com does exactly that. If you're not familiar with Face.com, they are experts in Face recognition. Their technology know how to "look" at a picture of somebody, even if it's a crappy picture (bad lighting, don't see the entire face etc...) and recognize who that person is.
Their new app, Klik, came out 2 days ago and is very simple: open the app, point the camera at friend, and watch as your friends' names instantly appear next to their faces. You can then automatically tag your friends in the photo and upload to Facebook if you want.
Think of it as the easiest way to tag people in photos.
And since you're already tagging people in photos, Klik also lets you checkin with that person to a location near you, and add cool filters to the photo you are uploading.
The funnest part about Klik is just pointing your iPhone at somebody and seeing their name float above their face, always really cool to see it actually work.