(Sorry for the inconvenience)
Openbox is a highly configurable, minimalist window manager. It is the window manager used by LXDE but can also be run separately from LXDE.
Figure 5.8a provides a screenshot of Openbox running on a PC-BSD system. The application menu was launched by right-clicking on an area of the desktop.
Figure 5.8a: Openbox on a PC-BSD System