Sony has unveiled the first two "Discovery Apps" bound for Vita later this year.Theses apps are "designed to showcase the unique features of PS Vita through innovative interactive experiences," according to a post from Sony product manager Mayumi Donovan on the PlayStation Blog.First up, Frobisher Says is a "surreal party game" in which you have to obey orders barked by the titular "strange little man". There are 50 minigames in total, utilising all of the Vita's various features.Take a look at the trailer below - we challenge you to make it all the way through to the end.Then there's t@g, which lets you graffiti virtual tags all over the real world using the system's GPS functions. You'll be able to track down other Vita owner's tags, pick up points and rewards for being particularly prolific and attempt to climb online leaderboards. You'll need a 3G-enabled Vita to enjoy this one. Again, trailer below.Both apps will be free to download from the PlayStation Store in May, though Frobisher Says will be available as a pre-order incentive from 22nd February.