Saint Paint Studio - Saint Paint - The Essential Image Editor
CutePDF - CutePDF is a simple but entirely powerful PDF files creator, converter, and virtual printer.
Stet.io - Stet.io is a high-quality pixel management platform that allows editing the pictures with online commands or multiple options with real-time effects or filters.
FoxIt - FoxIt offers solutions to read and edit PDFs from PCs or mobiles.
ImageForge - - ImageForge Standard Freeware Edition:
RadaeePDF - RadaeePDF is a library for developers who want to render, manipulate, annotate PDF files on Android, iOS and Windows.