FlexGet is a download manager similar to NZBGet or uTorrent Server except that it is Command Line only and has no Graphical interface. It can handle torrents as well as nzb’s and can be configured to download content from many sources including rss. Since it has no graphical interface it can be quite complicated to configure. On the other hand it is not limited to downloading specific media types like movies so it is very powerful in how it can be configured. If couchpotato, sonarr and headphones just isn’t enough, Flexget can fill in the gaps.