SpyKey is an iOS app that promises to monitor any PC keyboard at all times. Meaning it'll let you spy on what people are typing on their computers in real time. Uhhh....
You have to install a server on the person's computer before you start creeping but once you do, the app is supposed to show you everything they're typing. I'm going to say that it's a complete invasion of privacy and only a real genius would let this in the App Store. Can you imagine jealous husbands/wives hearing about this? Perverted co-workers? Crazy people? Hell, this wouldn't be good in anybody's hands.
However, if you are one of those nosey snoopers with no regards to other people's privacy, grab the app while it's hot! $5 [iTunes]