Torrent File Editor - Qt based GUI tool designed to create and edit .torrent files.
aria2 - aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink.
dottorrent-gui - An advanced GUI torrent file creator with batch functionality, powered by PyQt and dottorrent.
Torrents Time - Download and watch torrents in your browser!
bittorrent tracker editor - will add/remove bittorrent tracker from the torrent file(s).
Torrentdrive - Quickly and anonymously download torrents to the cloud and stream movies, music and more.