Yes, Foxit PDF reader is a free PDF reader created by other company.
Actually I would not recommend if you just want to try a different PDF READER. Foxit is maybe a little faster than Acrobat, but its displayed quality is worse. Also , there are lots of flickering when you resize the window.
Then why am I writing about this software? Because it has great advantages over Acrobat Reader. You can write texts , mark Highlight and Underline, and add notes to the PDF file. Some simple graphical diagram tools are also supported. But special watermark texts will also be written at the top right hand corner of the document when it is saved.
I heard that many small sized companies use Foxit Reader for this function and because it is free.