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.
Wondershare PDFelement - All-in-one PDF editor
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.
Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.
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.