CNN — Don't you just hate it when you keep running into the people you'd rather not see at all? Now there's an app to avoid that.
Cloak is a free iPhone app that pulls location information from Foursquare and Instagram. Using that info, it helps prevent those awkward encounters.
Users can set up notifications for people they'd like to avoid: exes, frenemies or maybe co-workers. There's even an option to avoid everyone in your social network.