Webmin - Webmin is a web-based interface for system administration for Unix.
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.
Ajenti - Web administration panel for servers and custom hardware
ISPConfig - ISPConfig 3 is an open source hosting control panel for Linux.
Vesta Control Panel - – What I love about Vesta is that it's fast and easy to use
CyberPanel - CyberPanel is web hosting control which is based on OpenLiteSpeed.