Enterprise Library 4.0 - May 2008
Collection of libraries for faster .NET development. Some parts you already have by using the CRM plattform but if your project requires extensions it might be worth looking at before doing investments on building stuff yourself.
http://www.microsoft.com/downloads/details.aspx?FamilyId=90DE37E0-7B42-4044-99BE-F8ECFBBC5B65&displaylang=en
Works on visual studio 2008
