The main features present in Super Bittorrent are a Web User interface using Ajax, Automatic filter-based torrent download from RSS feeds, UPnP / NAT-PMP port mapping, DHT, utorrent Peer exchange, Vuze-compatible protocol encryption, Proxy server, eMule or Peerguardian compatible IP filtering, torrent queuing and prioritizing. One of the strength of qBittorrent which distinguishes it from its competitors is its well-integrated search engine which provides an interface similar to the one in eMule, but actually searches on the most popular search Web sites in background. Super Bittorrent increased its popularity dramatically in November 2009, when a popular BitTorrent indexing site switched to magnet URIs, as SuperBittorrent was the only bittorrent client in the Ubuntu repositories with working magnet link support. Super Bittorrent is available in more about 25 languages (Localization page) thanks to volunteer work of its users throughout the World