Looking to get control over your virtual infrastructure? Then consider the Hytrust Appliance, which allows you to set up policies, access rules, and other security measures to segregate your virtual infrastructure from your users. It comes with integration with Microsoft’s Active Directory users and groups, and a newly designed user interface with the ability to handle extremely large virtual installations.

Pricing: Download for free, limited to managing three hosts
Standard edition $1000 per typical host
Enterprise: $1500 per typical host including federation across multiple appliances
Hytrust.com