Deluge is a full-featured, multi-platform, multi-interface BitTorrent client using libtorrent-rasterbar in it's backend and featuring multiple user-interfaces: GTK+, web and console.
It has been designed using the client-server model with a daemon process that handles all the bittorrent activity. The Deluge daemon is able to run on headless machines with the user-interfaces being able to connect remotely from any platform.
You may want to install this package to use the Deluge GTK+ user-interface as a thin client and connect to a remote daemon. See: