Mobile application development is one of the most competitive aspects of the wireless industry, and potentially one of the most hisk-risk. There are the bigger players such as Electronic Arts and Capcom, which have built on their success by designing games for other platforms. And there are companies like Rovio Mobile, Zynga and Zeptolab that have succeeded after the rapid success of one game (Angry Birds, FarmVille and Cut the Rope, respectively). But they are constantly being challenged by an up-and-coming slew of developers anxious to stomp out a position in what is still a very nascent industry. So which of these challengers is the one to watch? FierceDeveloper takes a look at some of the rising stars who just might join the ranks of the other mobile powerhouses. Special feature