WebTorrent

WebTorrent (Desktop) lets you stream any torrent straight in your browser without having to wait for the file to finish downloading.
Unlike Torrents Time that works solely with video, WebTorrent Desktop also supports streaming music and ebooks. WebTorrent Desktop connects to both BitTorrent and WebTorrent peers. It can talk to peers running Transmission or uTorrent, and it can also talk to websites that have WebTorrent installed.

The original streaming torrent client (written completely in JavaScript ) allows direct browser-to-browser Bittorrent downloads by utilizing a WebSocket based tracker protocol and WebRTC peer connections.

The streaming torrent client is available for Mac OSX, Windows and Linux.