Use any IRC client - I use MIRC on Windows. Join a good IRC network - I use Abjects. Subscribe to the shows and movies you want to automatically download, one

Use any IRC client - I use MIRC on Windows. Join a good IRC network - I use Abjects. Subscribe to the shows and movies you want to automatically download, one of their bots sends you files as they are posted. Write a script to copy them to the appropriate folder that Plex monitors.