Microsoft today released new Windows Azure development tools for building mobile apps and websites, and it made a few other announcements including the arrival of the Unity3D game engine on the Xbox One.
Windows Azure Mobile Services, a tool for building mobile backends for iOS, Android, and Windows Phone, became generally available today. Windows Azure Web Sites, a tool for building "business grade Web applications," is also now generally available.
Both can be used for free, with limitations on sites, storage, and data transfers for Web Sites and limits on API calls, devices, and jobs for Mobile Services. Once your mobile app has more than 100 users, you have to pay. Paying customers get a 99.9 percent monthly uptime guarantee, according to Microsoft's Azure blog. The tools were previously available in public previews.