TinyOPDS!

Calibre Web is a web app providing a clean interface for browsing, reading and downloading eBooks using an existing Calibre database.

Lucidor supports e-books in the EPUB file format, and catalogs in the OPDS format. Lucidor provides functionality to:Read EPUB e-books.Organize a collection of e-books in a local bookcase.Search for and download e-books from the Internet, for example by browsing OPDS catalogs. Convert web feeds into e-books.

Calibre2opds can generate OPDS and HTML catalogs from the metadata of the calibre e-book library manager. These catalogs can then be used both to browse your e-book library online and also to download books on demand.

COPS' main advantages are :