uTorrent is pretty much the app to get on your desktop if you download torrents. It's simple, fast and just works. If you haven't heard of it before I'd definitely suggest checking it out!
uTorrent have announced a great new feature to their beta app, the ability to drag and drop downloaded files to you Android devices! This is cool news if you utilise torrents for getting your media fix, especially movies which can be a hassle to transfer to your device (or many devices if you're one of the lucky ones).
They have also announced the ability to encode downloaded videos into formats supported by your various android devices, although this feature will only be available on the paid version of the application.
An android app exists to let you manage your desktop uTorrent downloads, although it is not itself a true torrent downloaded app.