API Support for your favorite torrent trackers.
Radarr is a movie collection manager for Usenet and BitTorrent users.
Prowlarr is an indexer manager/proxy built on the popular *arr .net/reactjs base stack to integrate with your various PVR apps.
Looks and smells like Sonarr but made for music.
Bazarr is a companion application to Sonarr and Radarr that manages and downloads subtitles based on your requirements.