dottorrent-gui - An advanced GUI torrent file creator with batch functionality, powered by PyQt and dottorrent.
bittorrent tracker editor - will add/remove bittorrent tracker from the torrent file(s).
Android Torrent Client - Android Torrent Client. Open Source. GPLv3
Bitford - BitTorrent client for Chrome that can stream videos while they're being downloaded
Koinonein BitTorrent Client - A fast and modern BitTorrent Client.
qMakeTorrent - an advanced torrent file creator with batch functionality, powered by libtorrent-rasterbar