This is a small framework I am putting together for building applications under Silverlight for those wishing to use Test Driven methodologies and MVC patterns.

It current includes the following:

• A "commanding" implementation, including WPF's ICommand interface, a CommandManager, CommandBinding attached properties, and a base class for commands
• A lightweight IoC container
• Classes for implementing the Model-View-ViewModel pattern (very similar to MVC)

Download the Silverstone.dll here