Established in 2004, TV Tropes initially focused on various tropes in television, but has since shifted to those in general media, toys, writings, and their associated
fandoms. It also covers non-media subjects such as history, geography, and politics. Contents of TV Tropes are written and maintained by a community of
volunteers, known as "Tropers". According to the site's
Google Analytics in August 2020, tropers primarily consist of 18-34 year olds. From April 2008 until July 2012, TV Tropes published
free content. After that, the site modified its license to allow only
non-commercial distribution of its content but continued to host the prior submissions under a new distribution license. TV Tropes runs on its own
wiki engine software, an extremely modified version of
PmWiki to the point where the PmWiki website lists that it "no longer uses PmWiki in any way; the only trace that remains is in the URL" and that "no code is in use" but is not
open source. Before October 2010, it was possible to edit anonymously; however, registration is now mandatory for all other activities besides viewing the website. TV Tropes has two subwikis meant to categorize the more informal tropes and is held to less rigorous standards. Darth Wiki, named after
Darth Vader from
Star Wars as a play on "the dark side" of TV Tropes, is a resource for more criticism-based trope examples or common ways the wiki is inappropriately edited. Sugar Wiki, on the other hand, is about praise-based tropes, such as funny or heartwarming moments in works, and is meant to be "the sweet side" of TV Tropes. ==History==