Ligature2PDF OCR converts image files into searchable PDF or Text output. An exceptional feature of Ligature2PDF OCR is that the transformed PDF file retains the original image as the viewable/printable layer with the newly searchable text layer hidden behind. This ensures the viewable/printable fidelity of the original document. The OCR'd text can also be extracted using Acrobat cut&paste tools.
Availability: Lig2PDF reads text in US English, UK English, German, Italian, French, Spanish, Swedish, Danish, Norwegian, Finnish, Hebrew, Portuguese, Dutch, and Czech.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.