For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/openSUSE_Tumbleweed/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu
For openSUSE Leap 42.3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/openSUSE_Leap_42.3/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu
For openSUSE Leap 42.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/openSUSE_Leap_42.2/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu
For openSUSE Leap 42.1 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/openSUSE_Leap_42.1/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu
For openSUSE 13.2 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/openSUSE_13.2/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/15.5/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:FabioMux/15.4/home:FabioMux.repo
zypper refresh
zypper install rubygem-fluxbox_apps_menu