BGR regularly tries to draw readers’ attention to great paid apps when they become free for a limited time, and the latest addition to our growing list of great apps gone free is DataMan Next. In a world where unlimited wireless data is going the way of the dinosaur at many carriers, keeping tabs on your usage can go a long way to help you avoid getting slapped with overage charges. And if you have to monitor your data usage anyway, you might as well do it with an iPhone app that is as gorgeous as it is useful. Johnny Ixe’s DataMan Next app tracks your data usage and forecasts how much you’ll use moving forward in an effort to