QTorrent is a BitTorrent client that uses the Qt widget-set. QTorrent allows you to have several torrents open at the same time from within the same program window, offering you easy overview, access and management through a list-mode.
Every torrent also has it's own page where you can control things like upload speed and upload slots. A page that shows some statistics of all open torrents is also available.
To use QTorrent, just download the tarball, extract it somewhere and run the 'qtorrent' binary. Installing QTorrent is not necessary.