PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
PDFTools by SheelApps - PDFTools
PDF Arranger - Small python-gtk application, which helps the user to merge or split pdf documents and rotate, crop...
GSView - Use Ghostscript GSview to open PDF files with owner password restrictions.
Debenu PDF Tools - Simple to use solution to merge PDF files, edit document properties, add and edit custom metadata, convert images to PDF, convert PDF to text and much more.
QPDF - QPDF is a command-line program that does structural, content-preserving transformations on PDF...