Advanced automation and management for the virtual datacenter
Citrix Essentials™ provides a set of management and automation capabilities to help customers transform datacenters into proactive and automated delivery centers. The Citrix Essentials platform builds on, and extends, the capabilities of either the free Citrix XenServer™ or Microsoft Hyper-V™ base virtualization platform.
http://www.citrix.com/English/ps2/products/feature.asp?contentID=1687093