Library 2.0

MusicBrainz is a project by the MetaBrainz Foundation that aims to create a collaborative music database that is similar to the freedb project. MusicBrainz was founded due to the restrictions placed on the Compact Disc Database (CDDB), a database for software applications to look up audio CD information on the Internet. MusicBrainz has expanded its goals beyond serving as a CD metadata repository, evolving into a structured online database for music information, including details about artists, performers, and songwriters.

Goodreads is an American social cataloging website operated by Goodreads, Inc., a subsidiary of Amazon. Users can search its database of books, annotations, quotes, and reviews and expand the database by registering books to generate library catalogs and reading lists. They can also create their own groups of book suggestions, surveys, polls, blogs, and discussions. The website's offices are located in San Francisco.

Zotero () is a free and open-source reference management software to manage bibliographic data and related research materials, such as PDF and ePUB files. Features include web browser integration, online syncing, generation of in-text citations, footnotes, and bibliographies, integrated PDF, ePUB and HTML readers with annotation capabilities, and a note editor, as well as integration with the word processors Microsoft Word, LibreOffice Writer, OnlyOffice, and Google Docs. It was originally created at the Center for History and New Media at George Mason University and, as of 2021, is developed

LibraryThing is a social cataloging web application for storing and sharing book catalogs and various types of book metadata. It is used by authors, individuals, libraries, and publishers.

CiteSeerX (often stylized as CiteSeer; formerly called CiteSeer) was a public search engine and digital library for scientific and academic papers, primarily in the fields of computer and information science.

database providing an authoritative source of bibliographic information

model for a modernized form of library service

online database of written speculative fiction and its creators

approach to cataloging

thumb | right | alt=A window of a referrer is open on a wikipedia article using citation templates with embedded COinS tags | An example of referrers acting on a Wikipedia article using citation templates with embedded COinS tags ContextObjects in Spans (COinS) is a method to embed bibliographic metadata in the HTML code of web pages. This allows bibliographic software to publish machine-readable bibliographic items and client reference management software to retrieve bibliographic metadata. The metadata can also be sent to an OpenURL resolver. This allows, for instance, searching for a copy o

open XML-based language

conceptual model

collaborative cataloging of literature based in web

conceptual entity-relationship model

Shelfari was a social cataloging website. Shelfari users built virtual bookshelves of the titles they owned or had read, and could rate, review, tag, and discuss their books. Users could also create groups that other members could join, create discussions, and talk about books, or other topics. Recommendations could be sent to friends on the site for what books to read.

Babelio is a French social cataloging website and a mobile app dedicated to literature. It is a social network for users to review books and generate personal library catalogs, which can be shared and commented on by other users.

Runivers () is a site devoted to Russian culture and history. Runivers targets Russian speaking readers and those interested in Russian culture and history.