UnderHost use 3 control panel.
The most used is CPanel/WHM
cPanel is a hosting automation company driven by technology and dedicated to providing the most feature rich, easy to use, practical applications. We are committed to the hosting community and our continued role as a market leader.
Root and Reseller Administration Panel
Username: demo
Password: demo
Domain Owner Panel
Username: x3demob
Password: x3demob
Reseller Domain Panel
Username: x3demoa
Password: x3demoa
* Note: This version will allow you to try out the demo if you are behind a firewall.
http://cpanel.net
Used also on VPS, Dedicated Servers: (Direct Admin - Plesk)
DirectAdmin:
http://directadmin.com/features.html
Plesk:
http://www.parallels.com/products/plesk/
CPanel are used on all shared account with fantastico.
DirectAdmin are used on demand and on semi-dedicated package.
Both of them are offer on Virtual Private Servers and Dedicated