xfce4-panel-plugins from home:cleberps:xfce project
Select Your Operating System
Add repository and install manually
For SLE 11 SP4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:cleberps:xfce/SLE_11_SP4/home:cleberps:xfce.repo zypper refresh zypper install xfce4-panel-plugins