Description:

rpmorphan finds "orphaned"[1] packages on your system. It determines
which packages have no other packages depending on their installation,
and shows you a list of these packages. It intends to be clone of
deborphan Debian tools for rpm packages.

It will try to help you to remove unused packages, for example:
* after a distribution upgrade
* when you want to suppress packages after some tests

Several tools are also provided :
* rpmusage - display rpm packages last use date
* rpmdep - display the full dependency of an installed rpm package
* rpmduplicates - find programs with several version installed

Yum offers a program called 'package-cleanup' which you can use to
carry out similar tasks.

[1] Note that orphan is used in the sense of Debian's deborphan, and
is NOT the same as Fedora orphaned packages which are packages that
have no current maintainer.