The app offers full access to your Dropbox files at any time. You will be able to automatically upload photos and videos to Dropbox when your phone is charging, and use links to share files from your cloud storage. There is an option to create a "Favorites" list which will save certain files for offline access. And, you'll also be able to set up multiple Dropbox accounts and switch easily without signing out.
While the app does include Dropbox in the name, Dropbox is just the first step. Huyn is already planning to add support for OneDrive, Google Drive, Box.com and Mega.co; and, Huyn has also created an API for his app which will allow Windows Phone developers to connect their apps to CloudSix and easily send files to those various cloud storage services.
The app is available for free, but you can pay $1.29 to remove the ads if you want.
Download: CloudSix for Dropbox
source: Rudy Huyn CloudSix API