Doo.net - organize all of your documents in one place.

"Doo.net is a new service that organizes all of your documents from your hard drive and cloud services (including email) into on system. You can search your documents via keyword, date, optical character recognition, tags, and document type. It will keep all of your device and documents in sync also."

http://educationaltechnologyguy.blogspot.co.uk/2012/06/doonet-organize-all-of-your-documents.html