SickRage - SickRage is a fork of SickBeard to automatically download TV shows from usenet or torrents.
NZBGet - The most efficient usenet downloader.
FlexGet - FlexGet is a multipurpose automation tool for all of your media
NZBGet.com - Fast, reliable, and feature-packed NZB downloader.
Radarr - A fork of Sonarr designed to work with Movies.
SABnzbd - SABnzbd is a free/open-source cross-platform binary newsreader written in Python.