Gemini Solo is a stand-alone application for converting PDF documents into other formats. Solo can reflow, dehyphenate and export text as HTML, RTF, eBook, plain text. Images can be output as JPEG, Tiff, PNG. Documents can be converted in batches, per-page or per-article thread. Bookmarks, hyperlinks and layout can all be retained.
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.