VMware is an unlikely target in your software compliance efforts.
The virtualization giant has inbuilt mechanisms for license deployment, so your license status is likely to be either correctly licensed or over-licensed.
For Software Asset Managers the opportunity with VMware is negotiating down annual maintenance charges based on actual usage or avoiding buying new licenses by making better use of existing purchases.
In a nutshell:
See a full review of 1E AppClarity in our SCCM plug-ins comparison from February 2012.
1e claim that if a company has deployed VMware Enterprise Plus licenses up to 20% of ESX hosts could be downgraded to cheaper editions based on their feature usage.
A working example using figures from 1E:
This does not include making better use of existing licenses when new projects or growth requires more licenses or bargaining power for those on an VMware Enterprise License Agreement (ELA).
The new version from 1E also includes a cost comparison calculator for those looking to compare swapping out VMware with Hyper-V.
More info here: www.1e.com