Microsoft released the Visual Studio 2010 Productivity Power Tool Extensions, collect a bunch of very straightforward and very useful features that help you in your every day life in VS. The features concentrate on editing, navigation, and other common tasks you use while constructing your code.
Visualization and Modeling Feature Pack provides increased support for visualization (web sites as well as C/C++ code), new UML support, and increased support for layer diagram extensibility to Visual Studio Ultimate 2010.
Web Site Visualization: New support for generating a DGML visualization for ASP.NET projects
C/C++ Native Code Visualization: New support for generating DGML diagrams for C/C++ projects
Generate Code from UML Class Diagrams: You can now generate code from your UML diagrams
Create UML Class Diagrams from Code: Create UML diagrams from existing code bases
Import UML from XML: Import UML class, sequence, and use case elements from XMI 2.1 files
Custom Validation Layer Rules: Write custom code to create, modify, and validate layer diagrams