One of several user interfaces available for YaST2, based on Qt and the
X Window System.

Yum is a utility that can check for and automatically download and install updated RPM packages. Dependencies are obtained and downloaded automatically prompting the user as necessary.

Fast metadata parser for yum implemented in C.

yum-utils is a collection of utilities and examples for the yum package manager. It includes utilities by different authors that make yum easier and more powerful to use.

Graphical User Interface for Yum.

zsync is a implementation of rsync over HTTP. It allows updating of files from
a remote Web server without requiring a full download or a special remote
server application. It uses a metafile, which is created on the server,
to determine which parts of a file the user already has; it then downloads
the remaining parts via HTTP. No special server or Web server module is
needed. It also works with gzip files, and content on the server can be
compressed to further reduce download times.

Command Line Package Management Using Libzypp