With the rollout of Windows Phone 7.5, Microsoft unveiled the online Marketplace that offers over the air installation of apps.

[1] Windows Phone Store supported credit card purchases, operator billing, and ad-supported content.

The ability to download a XAP file to a computer was also present, allowing a user to install an app from their SD card if no internet access was available.

This, according to Todd Brix, the General Manager for Windows Phone Apps and Store team, was on an ongoing promotion at $19.

Microsoft had lined up a wide range of popular games to be available from the launch of Windows Phone 7.

[7] Also at Gamescom, Microsoft unveiled more than 50 premium Windows Phone 7 games and apps[8] that used the Xbox Live mobile connection.

[11] Examples of restricted or banned content include pornography, promotion of violence, discrimination, hate, or the usage of drugs, alcohol and tobacco.

With a couple of configuration steps (complying with "separation of concerns"), users can generate a production-ready app for Windows Store.

Once all the configuration and look and feel is set, this online studio let you publish the app directly to Windows Phone Store.

Windows Phone App Studio makes it significantly easy for non-developers to publish homebrew or small business apps without indulging them in source code or hiring a developer, it can be leveraged as a starting point for professional developers for boilerplate code generation.

Once all the configuration is made, in addition to publishing the app, the user can actually download the Visual Studio project for advanced editing.