PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
PDFTools by SheelApps - PDFTools
PDF Architect - PDF Architect is a PDF Editor with free functions like rotate, delete and move pages and even more...
GSView - Use Ghostscript GSview to open PDF files with owner password restrictions.
Foxit Reader - Foxit Reader is a free and light-weight multi-platform PDF document viewer.
QPDF - QPDF is a command-line program that does structural, content-preserving transformations on PDF...