Free Xamarin Subscriptions for Windows Phone Developers!
Xamarin has a very special offer this August:
Get a Free, community-supported subscriptions of Xamarin.iOS and Xamarin.Android, including Visual Studio extensions, for personal use.
This offer is limited to independent Windows Phone developers (with at least 1 published app on or before August 17th, 2015) and until August 31st, 2015.