rpmrebuild is a tool to build an RPM file from a package that has already been installed. It can be used to easily build modified packages, and works on any Linux distribution that uses RPM.
Open source project that offer summary and download services on this page is a project that carry out their development work on other open source development sites. Their work is linked to this page via a feature called OFI, and their work is not carried out here on OSDN site.