Atlantis is an installer developers can use to install software on users' computers on multiple platforms. It was designed for installing PHP-GTK2 applications as an alternative to PEAR, but will theoretically work for anything.
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.