Windows Phone Developer Tools 7.1 Beta 2

 The Windows Phone SDK includes the following
  • Microsoft Visual Studio 2010 Express for Windows Phone
  • Windows Phone Emulator
  • Windows Phone SDK 7.1 Assemblies
  • Silverlight 4 SDK and DRT
  • Windows Phone SDK 7.1 Extensions for XNA Game Studio 4.0
  • Microsoft Expression Blend SDK for Windows Phone 7
  • Microsoft Expression Blend SDK for Windows Phone OS 7.1
  • WCF Data Services Client for Window Phone
  • Microsoft Advertising SDK for Windows Phone
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