AXPDF PDF watermark creator allow you to add watermark on your PDF to either protect the copyright of the contents or state that this is a draft before you send it to others.
Stand-alone application:
Works independently of PDF editors such as Adobe Acrobat, Adobe Illustrator etc.
Supported formats of watermarks:
Text watermarks You can add company name or other texts even macros (dynamic texts such as date, time, filename etc).
Image watermarks You can add images in JPEG format
Watermark hyperlink You can add hyperlinks (URL) on text watermarks and readers can click to be directed to the link specified.

Multiple watermarks You can add more than one watermark in pages using any watermark types above.
Supports watermarks at any position on the page
Header, center, footer and move by mouse
Rotate watermark to any angle
Supports TTF (True type fonts are searchable in PDF and search engine friendly), text size and color