PDF Split Or Merge is a Freeware

PDF Workshop - features Features

Insert empty pages
Ability to insert one or more empty pages to PDF books after the pages you specify.
Ability to specify the dimensions, color, internal text of the added empty pages.
Ability to write the PDF bookmarks to the output PDF books after updating them.
Ability to handle encrypted(password protected) PDF books.
General
The program is cross platform. It can run on any operating system (Windows, Mac, Linux, ...).
PDF Workshop - windows edition PDF Workshop - Mac edition PDF Workshop - Linux edition
Simple and stylish interface.
The program does not require Adobe Acrobat to be installed.
Daily support ... We are always online to help you.