TV Tropes is a wiki website that collects and documents descriptions and examples of plot conventions and devices, more commonly known as tropes, within many creative works. Since its establishment in 2004, the site has shifted focus from covering only television and film tropes to those in general media such as literature, comics, anime, manga, video games, radio, music, advertising, and toys, and their associated fandoms, as well as some non-media subjects such as history, geography, politics, and other real life occurrences, people, and events. The nature of the site as a provider of commentary on pop culture and fiction has attracted attention and criticism from several web personalities and blogs.
From April 2008 until July 2012, TV Tropes published free content. In July 2012, TV Tropes modified its license to allow only non-commercial distribution of its content but continued to host the prior submissions under a new distribution license.The TV Tropes website runs on its own wiki engine software, a heavily modified version of PmWiki, but is not open source. Before October 2010, it was possible to edit anonymously. Registration is now mandatory for all other activities besides viewing the website.
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