One of the most useful apps on my iPad is Documents [iOS - free] from Readdle. It can be used to read documents (PDF, Office, text, etc.) as well as books (PDF and epub) but it can also be used to listen to music, watch videos and browse photographs. And, it has some annotation capabilities – bookmark, highlight, underline and strike thru. But what makes it really interesting is its file management functionality. You can get files from email attachments, just about any cloud storage platform, and even download them from the Web using the built-in browser. Create folders and your own file system right on your device.
Combine Documents with another Readdle app – PDF Expert [iOS - $9.99] – and you can fill in PDF forms, highlight, make notes and draw on PDF documents from any number of sources and the forward them to just about anywhere. I was able to “fill in” a PDF form that wasn’t designed to be fillable by writing the information on the document using a stylus. PDF Expert will flatten the annotation layers into a standard PDF file that can be read by Adobe Acrobat. In just a couple of minutes the form was completed and emailed back, saving me from printing then snail-mailing a paper form. Do that a couple of times and you’ve paid for the app.
Documents provides tools that bridge the gaps between your desktop and your mobile devices and will quickly become one of the most useful apps on your iPad.