Ubuntu One Files for Android is an application written by Micha? Karnicki as part of Google Summer of Code Project (GSoC) 2010. The client is licensed under the GNU Affero GPL v3 and its source code is available from Launchpad.
The application lets you synchronize your phone contacts, files and photo gallery on the cloud automatically. Ubuntu One files also offers convenient feature to change the visibility of your files, making it easier for you to share files with the rest of the world.
Ubuntu One Files is also available on the Android Market, free of charge.
Note: Ubuntu One is a service similar to Box.net that enables you to store your files on the cloud. You do not need to be an Ubuntu user to use Ubuntu One. Each registered user are given 2GB space for free.