This project is an unoffcial and partial mirror of the SDL site. It only contains freely downloadable SDL materials. You can reach the official one at http://www.libsdl.org.
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.