Ubuntu One may not be as popular or feature-rich as Dropbox, but the file synchronization service bundled with Ubuntu has one nifty feature that makes it a handy tool -- the ability to synchronize Tomboy notes across multiple machines. To make use of this feature, you have to enable and configure the synchronization options in each instance of Tomboy. To do this, launch Tomboy, right-click on its icon in the gnome panel, and choose Preferences. Switch to the Synchronization section, select Tomboy Web from the Service drop-down list, and press the Connect button. Authorize your machine with the Ubuntu One service, switch back to the Preferences window and press Save. Do the same on other machines running Tomboy. To sync notes manually, right-click on Tomboy's icon and choose Synchronize Notes. Alternatively, you can configure Tomboy to sync notes automatically by ticking the Automatically Sync in Background Every check box and specifying the desired time interval. That's all there is to it.

Now, the clever part is that you can view and manage your notes not only on every machine running Tomboy, but also using Ubuntu One's Web interface. In the Notes section there, you can add new notes as well as view and edit existing ones; and the service automatically pushes the changes to all connected Tomboy instances.