Visual Studio 2012 introduced several platform-wide enhancements available in the ISO:
Advanced code clone detection to find redundant code and "Code Metrics" to measure maintainability. General 2012 Improvements (All Editions) visual-studio-2012-ultimate-iso
A shared design surface between Blend for Visual Studio 2012 and the standard IDE for consistent UI rendering. Installation & Usage Notes UML diagrams (Class
Projects and key IDE components load asynchronously, allowing you to start coding before the entire solution is fully loaded. visual-studio-2012-ultimate-iso
Tools for creating Layer Diagrams, UML diagrams (Class, Sequence, Use Case), and Architecture Explorer to visualize complex codebases.
As the "Ultimate" edition, it focused on the entire application lifecycle management (ALM) process: