qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
Webtor - Download and play torrents with free cloud BitTorrent client
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
Torrentdrive - Quickly and anonymously download torrents to the cloud and stream movies, music and more.
rTorrent - rtorrent is a BitTorrent client for ncurses, using the libtorrent library.
Peerflix - Streaming torrent client for Node.js