I just discovered Microsoft Office Lens which is now available on both iOS and Android, it use to be just exclusive to Windows Phones.
Basically, you can take a picture of a skewed photo of a chart or diagram on paper or a white board, and then it will fancy it up. The app will run optical character recognition (OCR) and give you a clean looking editable version.
This can come in pretty handy if you are in a meeting or auditorium with an off-center view and need a clean copy of the graphic.
The video below is a bit old as it says you can get it in the Windows Phone store, which is true, but like I said, it’s now available for iOS and Android.