This is a script which generates an applications menu for Fluxbox using the freedesktop.org (XDG) standard. It requires the pyxdg library. By default the menu is generated as a submenu which can be included in a hand-maintained main fluxbox menu. There is another project which generates a more fancy XDG Fluxbox menu [1]; I wrote this partially to understand how the XDG menu works, but also to have a simpler script which handles only the applications menu.
To generate a menu:
fbxdgmenu.py > ~/.fluxbox/applications-menu
Menu entry for including a generated submenu:
[include] (YOUR_HOME_DIR/.fluxbox/applications-menu)
Menu entry for regenerating the menu:
[exec] (Regenerate menu) {/PATH/TO/fbxdgmenu.py > YOUR_HOME_DIR/.fluxbox/applications-menu}
By default, the xdg library looks for a menu file in /etc/xdg/menus/debian-menu.menu, which may not be present on your system by default: for example, on Ubuntu this file is provided by the menu-xdg package. If you do not wish to use this file, you may also specify an explicit path to another menu file as a parameter to the script:
fbxdgmenu.py /etc/xdg/menus/some-other.menu > ~/.fluxbox/applications-menu
I recommend /etc/xdg/menus/gnome-applications.menu, which provides a very complete list of installed applications.
[1] fluxbox-xdg-menu can also generate a wallpaper submenu, and has a header and footer that you may find useful. https://code.google.com/p/fluxbox-xdg-menu/