Although this was created with Obarun/Arch based distros in mind it works pretty universally for nearly all distro that have openbox available (nearly all except for Adelie that is). About building and installing obmenu-generator there is an older article here.
Originally published in the Obarun Forum, so here is a copy:
Openbox tweaks and tricks – no dbus – no ck2 – no user services
Minimalist tricks and treats
To start you need xorg-xinit and openbox installed:
From AUR download, build, and install obmenu-generator
You can use pacopts or cower if you don’t have something else as an AUR helper, ask for help if you want details, especially if you want to install yaourt, the best AUR helper ever created which was taken off AUR for a second time in less than a year. I wish they would make their minds up! Continue reading
It says on its description that it contains LXDE, therefore openbox, which is what I use most often. The installation was a little unusual but simple and worked out of the box. I tried an iso for the VLocity edition. I initially tried installing openbox and a few LXDE native packages I am comfortable with (lxterminal, pcmanfm, lxappearance etc.). Not much of what I installed really worked on openbox and the editions seemed older than I can remember. So I went back to xfce. 
systemd-free linux community 