Package: openbox

"openbox" package binaries on CentOS:

/usr/bin/obxprop /usr/bin/openbox /usr/bin/openbox-session /usr/bin/setlayout

You may install this package on CentOS with yum install openbox

"openbox" package binaries on Debian:

/usr/bin/gdm-control /usr/bin/obxprop /usr/bin/openbox /usr/bin/openbox-session

You may install this package on Debian with apt-get install openbox