Control panel for Proxmox VPS'

Firstly, apologies if this has been asked before and I expect it has.

I've installed Proxmox which is awesome and configured everything very easily including tc rules to limit OpenVZ containers.

Is there any sort of control panel which can be used/installed for individual VPS? Giving people visibility over their VPS - resource use/reinstall choice of os, etc.

Thanks!

Ben.