Wikipedia
AlternC
AlternC is a set of open source Web Hosting server management software for Linux/ UNIX-like systems, whose aim is to promote self hosting by individuals or small structures, and provide its users with an easy web-based interface to manage a web and mail server (and other Internet-based services).
Its main specificity is to provide its users with a non-technical web interface so that anybody can, without specific knowledge, host some web services. It also has some advanced options so that technical-savvy users can still fine-tune it.
It also features documentation in French and English.