Downloading a torrent is typically a two-step process that requires you to first download the file and then open it up in a client. Boxopus is a new web app that lets you skip the client and download torrent files directly to your Dropbox account.
Using Boxopus is simple. Once you sign up and link Boxopus to your Dropbox account, you only need to drag a file directly into Boxopus and the torrent starts downloading into your Dropbox account. No need for special programs or files, which means you can queue up torrents from any computer as long as you have a Dropbox account. Boxopus is still in beta, but it's free to use.