Cross-platform VNC-based and Web-based Management for Citrix XenServer and Xen Cloud Platform
viewing a Linux VM console on Linux with xvpviewer showing its shutdown, reboot and reset buttons
xvpweb interface for a small XenServer pool - halted VMs have a boot button, running ones a console button
viewing a Windows VM console on Mac OS X using xvpviewer
using the right-button context menu in xvpweb to view the properties of a VM