For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:leibing/openSUSE_Tumbleweed/home:leibing.repo
zypper refresh
zypper install motif
For 16.0 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:leibing/16.0/home:leibing.repo
zypper refresh
zypper install motif
For 15.6 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:leibing/15.6/home:leibing.repo
zypper refresh
zypper install motif
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:leibing/15.5/home:leibing.repo
zypper refresh
zypper install motif