The Toolkit is hosted on CodePlex.com. CodePlex is a site dedicated to open-source software. Projects hosted on CodePlex must include source code. This means that, unlike the rest of the Windows Phone FCL, the toolkit source code is freely available and can even be modified by you under the MSPL license.
Add the Windows Phone Toolkit library to your project via NuGet by opening the package manager console. In Visual Studio, select Tools/Library Package Manager/Package Manager Console. At the PM prompt enter the following command:
You can find more information about the Toolkit at http://phone.codeplex.com.
Downloadable from the Toolkit site are myriad examples that you may find worth ...