Google Drive App to Edit, Annotate, and Sign PDFs Posted on December 3, 2014 by Public RSS-Feed of Stephanie P. Wright. Created with the PIXELMECHANICS 'GPlusRSS-Webtool' at http://gplusrss.com Google Drive App to Edit, Annotate, and Sign PDFs? November 2, 2014 PDFzen is a great free web tool that allows you to edit and sign your PDFs online. This app is integrated with Google Drive which means that you can easily edit the PDFs you have in your Drive. When you are done, you can save your edits back to Drive or download the document as …