Found 3 packages
Windows Phone toolkit provides a collection of controls, extension methods and page animations to help create beautiful and consistent Windows Phone user interfaces and make common progamming tasks easier. Documentation and source are on CodePlex at http://phone.codeplex.com.
Simple library for enabling orientation changes animation for Windows Phone 7 Applications.
The DevPhoneToolkit for Windows Phone. Details at http://devphonetoolkit.codeplex.com/