Not technically a backup app, but camlistore (http://camlistore.org/ http://camlistore.org/) kind of does that: - you push your files to it - it optionally en

Not technically a backup app, but camlistore (http://camlistore.org/ http://camlistore.org/) kind of does that: - you push your files to it - it optionally encrypts the content and hierarchy - and stores it pretty much anywhere it can handle (on your disk, on S3, on MongoDB, on GCS, on another instance of camlistore, ...)