G2P is a tool to help you get the music you want. It opens a Web browser to Google and instructs it to search certain criteria to find a link that lets you download the music you want, whether it be a full album or just one song.
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.