qBittorrent is a multi-platform Bittorrent client developed in C++/Qt4. The qBittorrent project aims to provide a Free Software alternative to µtorrent. Its main features are its integrated search engine (allows searching for torrent from the main torrent Web sites simultaneously in a transparent fashion), its support for l'UPnP/NAT-PMP, Bittorrent protocol encryption (Azureus-compatible), Peer Exchange (PeX) compatible with µTorrent, IP filtering (eMule-like "ipfilter.dat" or PeerGuardian filters), Torrents (and the files they contain) prioritizing, remote control through a secure Web User Interface.

Features
•Polished familiar user interface
•Integrated search engine (adding new sites is not currently supported)
•All Bittorrent extensions: DHT, Peer Exchange, Full encryption, Magnet/BitComet URIs, etc
•Remote control through a Web user interface
•Advanced control over trackers, peers and torrents (queueing and prioritizing)
•UPnP / NAT-PMP port forwarding support