Here is a list of various samples that make use of DirectXTK.
http://code.msdn.microsoft.com/DirectXTK-Simple-Sample-608bc274
http://code.msdn.microsoft.com/DirectXTK-Simple-Win32-23db418a
http://code.msdn.microsoft.com/Marble-Maze-sample-for-c9f3706b
Direct3D with XAML Marble Maze
http://code.msdn.microsoft.com/Direct3D-with-XAML-Marble-1d51a37b
Getting Started with Direct3D on Windows Phone 8
http://www.catalinzima.com/2012/11/getting-started-with-direct3d-on-windows-phone-8-for-2d-game-development/
DirectX on Windows Phone: 2D Game Example using DirectX Toolkit
http://www.developer.nokia.com/Community/Wiki/DirectX_on_Windows_Phone:_2D_Game_Example_using_DirectX_Toolkit
Windows Store apps
Simple Samplehttp://code.msdn.microsoft.com/DirectXTK-Simple-Sample-608bc274
Win32 desktop apps
Simple Samplehttp://code.msdn.microsoft.com/DirectXTK-Simple-Win32-23db418a
Windows phone 8
Marble Maze sample for Windows Phone 8http://code.msdn.microsoft.com/Marble-Maze-sample-for-c9f3706b
Direct3D with XAML Marble Maze
http://code.msdn.microsoft.com/Direct3D-with-XAML-Marble-1d51a37b
Getting Started with Direct3D on Windows Phone 8
http://www.catalinzima.com/2012/11/getting-started-with-direct3d-on-windows-phone-8-for-2d-game-development/
DirectX on Windows Phone: 2D Game Example using DirectX Toolkit
http://www.developer.nokia.com/Community/Wiki/DirectX_on_Windows_Phone:_2D_Game_Example_using_DirectX_Toolkit