SugarSync

SugarSync is a back up system for your computer and other devices. What is cool about it is you can back up multiple computers and for example an iPhone and have the files sync with all systems connected  to the account. This may be useful for eLearning to keep for example word files up to date. For more information read David Pogue's colomn at http://www.cnbc.com/id/23826833/site/14081545