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.
Control Web Panel - (Former CentOS Web Panel) Free & PRO Linux Web Hosting Control Panel
CloudStack - Apache's CloudStack is a Project backed by Citrix and designed to be a direct competitor to...
ISPConfig - ISPConfig 3 is an open source hosting control panel for Linux.