You can download the developer tool s for Windows Phone 7 Series. The single download includes:

• Visual Studio 2010 Express for Windows Phone

• Windows Phone Emulator

• XNA Game Studio 4.0

One cool thing about this download package is if you already have a version of Visual Studio 2010 RC installed, this will act as an add-on to that.

The final release of Windows Phone developer tools will ship for free.

Download the tools from here.