Quoting from the ManageSoft official announcement:
ManageSoft — the leading supplier of Enterprise Software Management solutions — announced today it now supports VMware ESX Server with its Enterprise Compliance Manager software that enables its customers to fill the license compliance chasm created by the virtualization wave. This software provides a path to resolution for companies embracing application and server virtualization, but concerned about software publishers’ licensing policies…
ManageSoft is one of the companies which joined the Federation Against Software Theft (FAST) to discuss the implications of virtualization in software licensing.