ProBIND - ProBIND is a web application designed for managing the DNS zones for one or more servers running the ISC BIND DNS server software.
Webmin - Webmin is a web-based interface for system administration for Unix.
Admin4 - Admin4 is a tool for server maintenance via several plugin modules, running on Windows, Mac OSX, Linux and many more platforms. Currently, plugins for BIND DNS, LDAP, IMAP and PostgreSQL are included.
CloudStack - Apache's CloudStack is a Project backed by Citrix and designed to be a direct competitor to...
Control Web Panel - (Former CentOS Web Panel) Free & PRO Linux Web Hosting Control Panel
ISPConfig - ISPConfig 3 is an open source hosting control panel for Linux.