The RPM Package Manager (RPM) is a powerful command line driven package management system capable…
Rpmorphan finds “orphaned” rpm 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 is a clone of deborphan debian software for rpm packages.
It provides some other rpm tools too : rpmdep, rpmusage, rpmduplicates, rpmextra