Vuze
Freemium
Vuze (formerly Azureus) is a free BitTorrent client.
aria2
Open Source
aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink, etc.
tTorrent
Freemium
tTorrent is a torrent (P2P) downloader client for Android based devices.
FrostWire
Open Source
FrostWire is a free, open source BitTorrent client.
BitTorrent
Freemium
itTorrent is a communications protocol of peer-to-peer file sharing ("P2P") which is used to distribute data and electronic files over the Internet.
Flud
Free
Flud was a social news reader application for iPad, iPhone, Android and Windows Phone.
Compare µTorrent with alternatives
Compare BitTorrent and µTorrent and decide which is most suitable for you.