What are the movie release informers?

Question

bittorrent

I don't use it myself, but a friend often uses torrents. Many torrent clients have features such as automatic download of torrent files from FTP folders and directories, and in addition there are subscription features via RSS.
Where are the services in order to be able to subscribe to RSS and automatically receive, an example of the same Simpsons / Griffin? Where are the sites that inform about the appearance of the necessary films on torrents?