PDF24 PDF Creator - Create PDF and convert documents to PDF for free with the free PDF24 PDF Creator.
PortableSigner - PortableSigner is a signing (with X.509 certificates) program for PDF files.
Foxit PhantomPDF - Edit PDF files with our feature-rich PDF Editor. Download Foxit PDF Editor to convert, sign, scan / OCR & more. A speedy PDF Editor alternative to Adobe Acrobat.
Merge PDF (by Smallpdf) - No file limit, no ad watermarks - a free and beautiful tool to combine your PDF files exactly the way you want it.
iSafePDF - iSafePDF is a free open source PDF protection software.
iPDF2Split - iPDF2Split is an online PDF splitting tool that lets you split a single PDF file into several smaller ones.