SolusVM - Solus Virtual Manager (SolusVM) is a powerful GUI based VPS management system with full OpenVZ...
cPanel - With its first-class support and rich feature set, cPanel & WHM has been the web hosting industry's most reliable, intuitive control panel since 1997.
VMmanager - VMmanager is a QEMU/KVM server virtualization management software, which presents perfect tools for creating virtual machines, providing VPS services, and building cloud infrastructure.
ServerPilot.io - Centralized hosting control panel for Wordpress and PHP web sites
Xen Orchestra - A complete web UI for controlling a XenServer or Xen infrastructure.
Webmin - Webmin is a web-based interface for system administration for Unix.