Chrome: Before Dropbox and Google Drive came around, we all used our Gmail accounts to store files, but it was never very easy to access them in bulk or send them to other services. MetisMe fixes that.
The application plugs directly into Gmail and creates a new "Attachments" side bar link. From here, you can view all of your attachments from the last year. You can easily send a file to Dropbox, Evernote or Google Drive from this menu, as well.
Finally, you can even set up rules similar to Gmail's own filters, so that you can automatically send certain types of files or attachments from certain senders directly to any of the three aforementioned cloud storage services.
MetisMe [Chrome Web Store]