instant messaging, different timetables, home automation scripts to front-end control PVR software and hardware, P2P file-sharing downloaders (BitTorrent), IRC, also casual games such as Tetris. Metadata extraction and web scrapers Kodi has the built-in optional function to automatically download metadata information, cover art and other related media artwork online through its web scrapers that looks for media in the user's audio and video folders and their sub-directories. These "scrapers" are used as importers to obtain detailed information from various Internet resources about movies and television shows. It can get synopses, reviews, movie posters, titles, genre classification, and other similar data. XBMCGUI then provides a rich display for audio and video files that the scrapers have identified. Scrapers use sites like The Movie Database (TMDb) or IMDb.com to obtain thumbnails and information on movies, thetvdb.com for TV show posters and episode plots, CDDB for audio CD track listings, and Allmusic (AMG) and MusicBrainz for album thumbnails, reviews, and metadata. Fanart.tv has been added to the list of information sources and XBMC can use it to retrieve logos, backgrounds, CDs with transparent backgrounds, album covers and banners among other image types for music artists, TV shows and movies, the popularity of which contributed to XBMC being able to handle new image types. Skins and themes Like the majority of applications that originated from a 'homebrew' scene, modification and customization of the interface using skins is very popular among Kodi users and hundreds of skins and themes are available for users to install. The Kodi skinning engine's flexibility is also advantageous to third parties wanting to create derivative works, as it facilitates rebranding the environment and making deeper changes to the look and feel of the user interface. As of Kodi version 17, the official default skins for new installs are "Estuary", for typical home-theater usage, and "Estouchy" for touchscreens. These newly designed skins replace the longtime default skin "Confluence", and are intended to present more content on the homescreen, be easier for new users, and bring "Kodi into the present day of UI design." Users can also create their own skin (or simply modify an existing skin) and share it with others via public websites that are used for Kodi skin trading and development. Many such third-party skins exist that are well maintained by the community, and while some skins are originals with unique designs, most begin as a clone or an