Get Bento Openbox
Bento, an Ubuntu Openbox Remix, is available as a 12.04.5 LTS* and 14.04.3 LTS* for 32 and 64bits architectures. You can get either or at the download site or on a mirror.
Bento Openbox is a light Linux distribution, easy to use and to customize, distributed as a LTS* thus very stable. Bento Openbox does not use a Desktop Manager. Openbox is used along with the programs openbox-menu and obsession (a light program forked from lxsession-logout, from the Lxde project).
* Long Term Service
The files are available for download here : http://downloads.linuxvillage.org/
There are also OBI versions (One Button Installer) et 9w (all also non official) built out of several Ubuntu versions. Discover how it works here: