From the award winning authors of PDF-XChange a Robust, Compact and fully featured PDF Viewer allowing you to View, Markup, Manipulate, Save PDF forms to disk, export pages to Images and much more. Multi language with comprehensive help file. A portable version is also available at just 4MB in download size.
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.