Been trying the TVShows app for a while to automatically download TV show torrents
Works well.

Automatic allows you to set up subscriptions for virtually any content linked in RSS feeds: podcasts, videocasts, torrentcasts... Rule of thumb: if it ends in '-cast', you can get it with Automatic. Can use it with Transmission

Clutch is a WebUI for the Transmission daemon. It allows you to manage your torrents from anywhere you can access the internet.