rTorrent is a fast and efficient command-line based BitTorrent client. It can work many front-end interfaces such as ruTorrent. When used with a web interface it is similar to other clients like uTorrent Server or Deluge.
Pydio is a file-sharing and synchronisation application that can be freely installed on multiple platforms. It requires a web server such as Apache, PHP and MySQL / MariaDB to be installed. It is similar to cloud file storage software like ownCloud but has more features in some departments and is geared more towards local network file storage.