Freedaisy is a free implementation of Daisy book standard for allowing MP3 files to be indexed using (X)HTML and SMIL. Daisy is frequently used by visually impaired users, so they can listen to audio books with chapters.
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.