Seerr is a request management and media discovery tool built to work with your existing Plex/Jellyfin ecosystem.

Sonarr is a PVR for Usenet and BitTorrent users. It can monitor multiple RSS feeds for new episodes of your favorite shows and will grab, sort and rename them. It can also be configured to automatically upgrade the quality of files already downloaded when a better quality format becomes available.

NZBGet is a binary downloader, which downloads files from Usenet based on information given in nzb-files. NZBGet is written in C++ and is known for its extraordinary performance and efficiency.