Print Anywhere Android is a FREE application that allows you to print documents pdf and to modify them taking them from your device or your cloud (Dropbox or Google Drive) so simple fast and with a few simple clicks.
In order to exploit the full potential of this application you must have an account Google Cloud Print (http://www.google.it/cloudprint/learn/):
"Google Cloud Print is a new technology that connects your printers to the web. With Google Cloud Print you can make available to you and the people you choose your printer, home office applications you use every day. Google Cloud Print works on phones, tablet, Chromebook, PC and any other device connected to the Internet from which you want to print. "
In the event that the user application does not have a Google Cloud Print account or has not associated with any printer to it, no problem!
It's can do it directly from the app using the simple built-in the app.