Webmin
From SuperbHosting.net Support Wiki
Created for use with OpenSolaris, Linux and other UNIX-like systems, Webmin is a web-based system configuration tool. Using Webmin you are able to configure many operating system internals, such as users, disk quotas, services, configuration files etc., as well as alter, modify and control many OpenSource apps, such as the Apache HTTP Server, PHP, MySQL etc.
Webmin is based largely on Perl, running as its own process and web server.
