Another option is the official "BitTorrent" client (prior to version 6, of course) from bittorrent.com. It contains both a console and a curses version. It's usually called the bittorrent package (instead of the bittorrent-gui package, which is the GUI version) in various Linux distros. The latest for Linux is 5.x, although Ubuntu/Debian only has 3.x. Run bittorrent-console or bittorrent-curses for the console and curses versions, respectively (on 4.x and 5.x); or btdownloadheadless.bittorrent or btdownloadcurses.bittorrent (on 3.x).
