WattOS is described as 'Fast desktop Linux distribution based on Debian. Using the lightweight Openbox window manager as its default user interface, the distribution strives to be as energy-efficient as possible' and is a Linux Distro in the os & utilities category. There are more than 100 alternatives to WattOS for a variety of platforms, including Linux, Self-Hosted, BSD, Windows and Mac apps. The best WattOS alternative is Linux Mint, which is both free and Open Source. Other great apps like WattOS are Ubuntu, Debian, Fedora and Arch Linux.