ServerPilot.io - Centralized hosting control panel for Wordpress and PHP web sites

Webmin - Webmin is a web-based interface for system administration for Unix.

AppZero - AppZero is a monitoring and migration tool that allows users to keep track of different applications and servers in both simple and complex IT environments.

Ajenti - Web administration panel for servers and custom hardware

ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.

Froxlor - Froxlor: The server administration software for your needs.