Head-r recursively follows links located at (HTML) Web pages hosted on an HTTP server, and performs HEAD requests upon links of interest to the user. The intended use is to create URI lists for later selective mirroring of file hosting sites.
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.