SolusVM
SolusVM is a virtual server control panel from SolusLabs Ltd. SolusVM supports OpenVZ virtualization (linux), Xen virtualization (Linux, Windows, BSD)and KVM virtualization (Linux, Windows, BSD).
The module allows you to create, destroy, suspend, unsuspend, upgrade, downgrade, reboot, boot and shutdown virtual servers, plus functions to provision virtual servers in different locations, all directly from within WHMCS.
The client also has an array of functions and statistics from within the client area, including, reboot, boot, shutdown, change passwords, change hostname, view resource usage and graphs, plus the added bonus of a serial console or VNC.
Client View: http://soluslabs.com/images/whmcs_client_view.png
Admin View: http://soluslabs.com/images/whmcs_admin_view.png