LibraryThing

LibraryThing is a prominent social cataloging web application for storing and sharing personal library catalogs and book lists.

Users (informally known as thingamabrarians, a term coined by contributor RJO) can catalog personal collections, keep reading lists, and meet other users who have the same books. While it is possible to keep a library catalog private, most people choose to make their catalogs public, which makes it possible to find others with similar tastes. Thingamabrarians can browse the entire database by searching titles, authors, or tags generated by users as they enter books into their libraries.

LibraryThing was developed by Tim Spalding and went live on August 29, 2005. By its one-year anniversary in August 2006, LibraryThing had attracted more than 73,000 registered users who had catalogued 5.1 million individual books, representing nearly 1.2 million unique works. The LibraryThing website displays Google AdSense advertising on work and author pages for users that are not logged in, and receives referral fees from online bookstores that supply book cover images. Individual users can sign up for free and register up to 200 books. Beyond that limit and/or for commercial or group use, a subscription fee is charged. Online bookseller Abebooks bought a 40% share in LibraryThing in May 2006 for an undisclosed sum.

At the end of June 2006, LibraryThing was subject to the Slashdot effect from a Wall Street Journal article. The site's developers added servers to compensate for the increased traffic. In December of the same year, the site received yet more attention from Slashdot itself over its UnSuggester feature, which draws suggestions from books least likely to appear in the same catalog as a given book.

LibraryThing maintains two blogs and a forum for discussions about LibraryThing. Since the introduction of the forum section of the site, called "Talk," the previously active LibraryThing Google Group has been retired.