Haihaisoft PDF Reader - Haihaisoft PDF Reader is the name of a free to use PDF reader and printer that is extremely simple to launch.
Zhizhi Reader - Zhizhi Reader is a web-based software that helps you to read documents and books easily.
Altarsoft PDF Reader - Altarsoft PDF Reader is a simple to use PDF files management program that allows its users to view PDF files, encrypt the files and even annotate these files as well.
Flexcil Inc. - View PDF documents, annotate them, and take notes without struggle on your tablet devices
eXPert PDF Reader - eXPert PDF Reader is a free to use PDF reader and views for the Windows operating systems.
Skim - Skim is a PDF reader and note-taker for OS X.