SalentOS is a GNU / Linux distribution based on Ubuntu that uses Openbox as window manager. SalentOS has been designed to combine lightness (hence the choice of Openbox), but at the same time want to maintain the completeness and features of Ubuntu. The system includes elements of gnome and xfce.
This is not a distribution of the Ubuntu family, nor is connected to Canonical in any way.
http://www.salentos.it