The Windows Phone 8 SDK can be downloaded from Windows Phone Dev Centre (Microsoft Download Centre).
The following tools are installed when the Windows Phone 8 SDK is installed.
- Visual Studio Express 2012
- Microsoft Expression Blend for Windows Phone.
- Windows Phone Emulator
Along with this, the other necessary tools like App Deployment, Windows Phone Device registration etc. are also installed.
If the Visual Studio 2012 is already installed on the system, the windows phone tools and templates will be integrated to the existing installation of Visual Studio 2012.
Note that the Windows Phone 8 SDK requires Windows 8 64 bit system.