Vesta Control Panel - – What I love about Vesta is that it's fast and easy to use
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.
Control Web Panel - (Former CentOS Web Panel) Free & PRO Linux Web Hosting Control Panel
Webmin - Webmin is a web-based interface for system administration for Unix.
Froxlor - Froxlor: The server administration software for your needs.
Virtualmin - It includes numerous features not in the GPL version (like script installers, resellers, HTML editor, an improved UI, mobile access, spam and virus filtering).