I am sharing some of the resources that I had demonstrated during my session in Green-Hyper Virtualization session.
Green-Hyper: Server energy savings calculator from http://www.hyper-green.com
Microsoft Assessment and Planning toolkit for energy efficient computing http://technet.microsoft.com/en-us/solutionaccelerators/dd537569.aspx
Visio add-in for virtualization http://visiotoolbox.com/downloads/gogreen/How-To-Analyze-Rack-Server-Virtualization.pdf
Microsoft Integrated Virtualization ROI Tool https://roianalyst.alinean.com/microsoft/virtualization/
Performance and Resource Optimization (PRO) in SCVMM 2008 http://technet.microsoft.com/en-us/library/cc764283.aspx