wattOS是一份基于Ubuntu的快捷的桌面Linux发行。它采用轻量级的Openbox窗口管理器作为缺省用户界面，并力争尽可能节省能源，从而可以用在低配置及回收利用的计算机上。
Ronald Ropp has released the third beta build of wattOS 1.0, an Ubuntu-based desktop Linux distribution aiming at running computers in a lightweight but fully-featured way using less energy. What's new? "All of the improvements that you see in Ubuntu 9.04 you see in wattOS beta 3. Many of the improvements are under the hood, but improve the end user experience. Also the continued integration and evolution of the wattOS power management tool. Changes over beta 2 - all of the changes that improve things like hardware support, inclusive of the ongoing improvement of Ubuntu: improved hardware support including wireless networking; ext4 file system support; updates of almost all core applications; full LXDE integration; replacement of wicd with Network Manager; wattOS power manager installed by default; better clean-up of old files; addition of gwibber client." Read the full release announcement. More information like screenshots and video show can be found on wattOS website.
