gc2oc Link provides a link to a opencaching.de listing from a geocaching.com listing. The user has to install a greasemonkey skript to add the link to the GC listing page.
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.
