Ombi - A simple way for your shared media users to request and download content - automatically!
PlexPy - A Python based monitoring and tracking tool for Plex Media Server.
CouchPotato - A Video Library Manager for Movies. Automatic torrent/nzb searching and hands off to torrent or newsgroup downloading client.
Radarr - Radarr is an independent fork of Sonarr reworked for automatically downloading movies via Usenet and BitTorrent, à la Couchpotato.
Sonarr -An automatic TV Shows downloader and manager for Usenet and BitTorrent. It can grab, sort and rename new episodes and automatically upgrade the quality of files already downloaded when a better quality format becomes available.
NZBGet - NZBGet is a binary downloader, which downloads files from Usenet based on information given in nzb-files.