CloudKafe
CloudKafe is a website designed to help manage multiple cloud storage networks. For example, you may connect your Dropbox, Google Drive, Evernote, Microsoft OneDrive, or many other accounts to CloudKafe. Once connected, you will only need to sign into this website to access all other accounts. You can browse through your documents, photos, videos, notes, or contacts.
One benefit to having all the accounts connected though CloudKafe is the ability to quickly and easily search for a specific document. Another benefit is the ability to copy or move files from one account to the other. Sharing is also easy with CloudKafe because of the "Basket" feature. Select multiple files that you want to share with others, regardless of what account it's on, and then share them all with an email address.