Need to note that you don’t have to use them for piracy. They also work great if you rip your own media and throw it into an import directory. As long as it’s named close enough the apps will pick it up, organize and apply and meta it needs. I use a dedicated instance just for hand ripped UHD.
Wiki (linked from one of the githubs, has links to all apps and more info than the githubs): https://wiki.servarr.com/
Lidarr (Music): https://github.com/Lidarr/Lidarr
Radarr (Movies): https://github.com/radarr/radarr
Readarr (Books): https://github.com/readarr/readarr
Sonarr (TV): https://github.com/sonarr/sonarr