Nuance PDF Reader, with a Conversion Feature to Word and Excel

We may be familiar with PDF files. Two popular free program to read PDF files, too many of us already know, the Adobe Acrobat Reader and Foxit Reader. Not long ago, a company better known for making software recognition (identification), also released a free software to read PDF.But if only able to read PDF, maybe we have the choice fell on Foxit Reader or Adobe PDF Reader. Then what advantages?