openbox: Openbox (Openbox Window Manager) openbox: openbox: Openbox is a standards compliant, fast, light-weight, extensible openbox: window manager. Openbox is fully functional as a stand-alone openbox: working environment, or can be used as a drop-in replacement for openbox: the default window manager in the GNOME or KDE desktop environments. openbox: openbox: openbox: openbox: openbox: