XenServer is a commercial virtualization platform Citrix. There is open source version of Xen Virtualization available.

https://xenserver.org

Managing XenServer

To manage Xen Server, you need to download and install XENCENTER. This is a windows software.

If you are using Linux, you can use

Xen Orchestra

Web Interface for Xen Server.

https://xen-orchestra.com

OpenXenManager

Open Source Linux client for XenServer.

https://github.com/OpenXenManager/openxenmanager