BCGMobile for Windows Phone 6.0
the author of this app says:
BCGMobile for Windows Phone is a product targeting Windows Phone 7.0 and Mango. It's designed to speed up the development of mobile applications and contains a set of highly demandable controls including Chart, Gauge, Planner and others. The highlighted features are: Charts Gauges Calendar and Planner and other nice-looking, professionally-designed controls.