Bit Torrents allow users to download large files in a small amount of time by utilising peer to peer networking and shared access to a multitude of files both complete and partial. Rtorrent is an open source, free Bit Torrent client that anyone can download and use for themselves. The amount of Torrents available to download is staggering. While it's important to remember that you must always have the permissions needed to use any downloaded files, the options are almost limitless.