Fluxbuntu is a lightweight operating system (Linux distribution) which uses the Fluxbox window manager and is based on Ubuntu. By contrast, Ubuntu uses the GNOME desktop environment, Kubuntu uses KDE, and Xubuntu uses Xfce, all of which are somewhat more demanding of computer memory and resources. Fluxbuntu is designed to be versatile, while minimizing the need of system resources and can run on a system with only a 300 MHz CPU and 64 MB of RAM. The Fluxbuntu project is still being developed, according to the Fluxbuntu website. The last version release was in October 2007.