PDFTK Builder - PDFTK Builder is a free graphical interface to for PDFTK, making it much easier to use.
PDF Password Remover Tool - PDF Password Remover Tool. Free PDF password remover tool by PDF Technologies. Remove passwords from PDF documents.
PDFTools by SheelApps - PDFTools
4dots Free PDF Password Remover - 4dots Free PDF Password Remover can remove a password from a PDF file.
GSView - Use Ghostscript GSview to open PDF files with owner password restrictions.
Free Any Data Recovery - 100% Completely Free Data Recovery Software