pfSense - pfSense is a free and open source firewall and router that also features unified threat management, load balancing, multi WAN, and more
CyberPanel - CyberPanel is web hosting control which is based on OpenLiteSpeed.
Zentyal - Linux directory, domain, mail, gateway and infrastructure server for SMBs.
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.
NethServer - NethServer is an operating system for Linux enthusiasts, designed for small offices and medium...
Webmin - Webmin is a web-based interface for system administration for Unix.