Use annotation and drawing markup tools to add comments in PDFs, Adobe Acrobat and Acrobat Reader
Use photoshop to make PDF document look scanned or printed - YouTube
Increase the Contrast of a PDF to Sharpen & Darken Text | OSXDaily
PDF Scanner - Document Scanner - Apps on Google Play
OakPdf PDF Editor - sign your PDF, and apply high-quality scanner effect online.
HP Scan PDF Scanner Software Download [A-PDF.com]
5 Free Websites to Make a PDF Look Hand Scanned
Scan text and documents in Notes using the iPad camera - Apple Support
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Scan documents to PDF, Adobe Acrobat
Make Document Look Scanned | Make it with Adobe Creative Cloud
Scan Documents Online and Upload as Images | Dynamsoft Blog