software.opensuse.org.

Search for your software, make sure you choose the packages geared for your distro SLES11SP1 or 2.  Open the repository in your browswer, look for the .repo file.  For example, here’s the ImageMagick for SLES11SP2

http://download.opensuse.org/repositories/home:/cabelo:/ImageMagick/SLE_11_SP2/

Click the home:cabelo:ImageMagick.repo file

Select all, copy/paste into /etc/zypp/repos.d/Image.repo

zypper ref -s