Hello: I currently use GoodNotes, and I like it because it allows me to import a PDF document and take notes right on it. The problem is, GoodNotes does not have a PC counterpart. I want to be able to do the same things on a PC or Mac that I can do on my iPad. And that includes DRAWING and handwriting, whether I have a stylus and pad, or a touch-enabled laptop (which I may down the road). I don't care where the documents actually "live", as long as I have the ability to back them up and save an offline copy. So here's what I need, in no particular order: * Cross-platform apps between PC, Mac, (Linux would be nice, but is not a "must have"). * Ability to type notes on all platforms. * Ability to handwrite notes on all platforms. * Ability to import AND export PDF documents into/out of all platforms. * Ability to easily insert pages, links, etc. * A spelling dictionary would be nice. * Ability to draw on all platforms, and to have both handwritten notes and drawings to be transferred to/from all platforms with the note "document". I will probably have more to add, but these things are what I really "need" right now. Your thoughts?