CutePDF - CutePDF is a simple but entirely powerful PDF files creator, converter, and virtual printer.
Wondershare PDFelement - All-in-one PDF editor
FoxIt - FoxIt offers solutions to read and edit PDFs from PCs or mobiles.
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.
Kdan PDF SDK - Kdan PDF SDK is a universal mobile library for developers who want to render, manipulate and annotate PDF files in their iOS, Android device
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.