Wikipedia
Libranet
Libranet was an operating system based on Debian GNU/Linux.
The last version (as of April 25, 2005) released is Libranet 3.0, which cost about $90 in US dollars for new users, or $65 for existing Libranet users. The previous version, Libranet 2.8.1, became free to download.
Development of Libranet has been discontinued.