xfce-theme-manager from X11:xfce project
Select Your Operating System
Add repository and install manually
For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce/openSUSE_Tumbleweed/X11:xfce.repo zypper refresh zypper install xfce-theme-manager
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/X11:xfce/openSUSE_Factory/X11:xfce.repo zypper refresh zypper install xfce-theme-manager