High Quality Content by WIKIPEDIA articles! qBittorrent is a free software cross-platform BitTorrent client GUI written with Qt4. The program uses libtorrent-rasterbar C++ library for the torrent back-end (network communication) functionality. It is developed by Christophe Dumez, from the University of Technology of Belfort-Montbeliard in France. It was started in March 2006 and has been in active development ever since.