I've been working on a game for quite some time; Quizie. Quizie is a social trivia challenge game based on the idea of challenging your friends to quizzes you create, about things you share interests in, and competing for a top score. :)
It's Android exclusive, for now, but I do have plans to develop an iOS and Web version, as well as a varient...Quizie Educational. :) But more on that later.