I've worked on AppMobi, iOS(mostly), Android, Blackberry, phoneGap/appMobi and J2ME development and they always keep me on my toes (because of the ever changing landscape).
I worked on the iOS and Android development of a contacts backup app called AirBook (Links to paid iOS, free iOS and free Android apps) that lets you view your entire address book on somebody else's phone (iOS or Android) in case of your phone's battery runs out or you lose your phone!
I also developed "Ask Rahul"(Gandhi) (Android only), which is a pretty basic spoof app on the famous Indian politician that is sure to put a smile on your face.
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