What is UnityPDF?
UnityPDF lets you merge, split, divide, rotate, protect PDF files and more. All features are easy to use and do not require complex skills.
Just drag and drop one or more PDF files and simply click on what you want to do. UnityPDF can merge, split (one page per file), divide (by file size or number of pages), extract or insert a range of pages, protect and set permissions, view and clear metadata of PDF files.
The official website is no longer available. Last version, 188.8.131.52, released in February 2015, can be still downloaded from MajorGeeks