Hover is a WordPress plugin that replaces keywords with links and an optional popup. It uses JavaScript and CSS to create valid XHTML code and is based on mature JavaScript libraries like domTT and behaviour.js.
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.