dottorrent-gui - An advanced GUI torrent file creator with batch functionality, powered by PyQt and dottorrent.
Peerflix - Streaming torrent client for Node.js
bittorrent tracker editor - will add/remove bittorrent tracker from the torrent file(s).
JSTorrent - Torrent client for Google Chrome and Chromebooks
Android Torrent Client - Android Torrent Client. Open Source. GPLv3
Exatorrent - Exatorrent is a platform where you can download torrent files for free easily.