PDF Printer does what its name implies and more. The US$2.99 app allows you to open and read any document and turn it into a Portable Document Format (PDF} file. Even better, the app can convert email, photos, notes, and even web pages to PDFs.
Once you have captured the PDFs, you can save them, forward them via email or Dropbox, and open them in other apps capable of reading PDFs. You can also directly print the PDF if you have the hardware handy to do so.
PDF Printer also offers a scanner plug-in as a $0.99 in-app purchase, which is a limited time half-price sale. The plug-in lets your camera capture a document and quickly make turn into a PDF.
Using the app is straightforward, and help pops up when you first use it. I tried the scanner plug-in with positive results, and easily converted web pages and photos into PDFs. Mail can be converted by copying the mail to the clipboard and pasting it into the app. The PDF that resulted was sharp on screen and when it was printed to my laser printer.