Emit - Emit can stream from a Windows/Mac/Linux machine to an android/iOS device.
qBittorrent - Lightweight and open source torrent client that runs on all major platforms.
MX Player - Powerful video player with advanced hardware acceleration and subtitle support.
Deluge - Deluge is a full-featured BitTorrent client for Linux, Unix and Windows.
Vinyl Music Player - A fork of Phonograph Music Player that "makes all Pro features free, as they used to be".
BitTorrent - BitTorrent is a peer-to-peer program developed by Bram Cohen and BitTorrent, Inc.