OpenGEU is a free computer operating system based upon the popular Ubuntu Linux distribution, which in turn is based on Debian.

OpenGEU's aim is to successfully combine the power and ease of use of GNOME desktop environment with the lightweight, speedy, and graphical eye-candy features of the Enlightenment window manager into a unique and user-friendly desktop. While OpenGEU is originally derived from Ubuntu, the design of the user interface makes it appear significantly different to the user. OpenGEU's developers continue to create their own set of original art themes, software, and tools.

The current version of OpenGEU, based on Ubuntu 8.10 Intrepid Ibex, is called OpenGEU 8.10 Luna Serena.