The folks at Xamarin are showing some love for Windows Phone developers with an offer for a free Xamarin licenses. The offer is targeted at individual independent Windows Phone developers who have currently have an App in the Windows Phone app store. This free community edition includes Xamarin.iOS and Xamarin.Android as well as Visual Studio extensions.
If you’re a published independent Windows Phone developer and haven’t taken the plunge into native, cross-platform mobile development with C#, there has never been a better time than now to get started. — Xamarin Blog