From Lingewoud BV:
PDF Letterhead is a simple desktop app for Mac OSX to apply your own company logo or letterhead on PDF documents. It's just as easy as that: simply drag en drop two different files and email, print or save your PDF's with your company logo on it. Place your logo or letterhead on all kinds of documents. Add a different cover page to larger files like contracts. Email, print or save your personalized PDF's.
Removes non-transparent white backgrounds:
PDF Letterhead merges two PDF documents by overlaying. This of course doesn't work for non-transparent source documents. For example, PDF's created with Apple Pages always have a white background. We built a new feature that automatically removes these white backgrounds. PDF Letterhead is now suitable for PDF non-transparent documents.