Unlike many free Acrobat alternatives, it has a rich set of features such as Optical Character Recognition (OCR), annotation tools, hi ...

PDF-XChange Editor is a comprehensive PDF editor that allows you to create, view, edit, annotate, and digitally sign PDF documents with ease. With advanced features like OCR, document security ...

Another free software to add stamps to your PDF is PDF-XChange Viewer. It is a PDF viewer which has a lot of commenting and other tools. You get some stamp presets that you can use for stamping a PDF.

PDF-XChange Editor is a comprehensive PDF editor that allows you to create, view, edit, annotate, and digitally sign PDF documents with ease. With advanced features like OCR, document security ...