optipng from home:nightwishfan:sles_packages project
Select Your Operating System
Add repository and install manually
For SLE 11 SP3 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:nightwishfan:sles_packages/SLE_11_SP3/home:nightwishfan:sles_packages.repo zypper refresh zypper install optipng