What are some alternatives?
When comparing Foxit Reader and PDF Reader X, you can also consider the following products
Sumatra PDF - Sumatra PDF is a slim PDF/DjVu/EPUB/XPS/CHM/CBR/CBZ/MOBI viewer for Windows.
Evince - Evince is a document viewer for multiple document formats: PDF, Postscript, djvu, tiff, dvi, XPS...
PDF-XChange Viewer - PDF-XChange Viewer is an alternative viewer for PDF files that enables you to view and annotate PDF...
Xodo - Xodo is the ultimate cross-platform PDF viewer and annotator. And it’s 100% free.
Okular - Okular is a universal document viewer based developed by KDE.
MuPDF - MuPDF is a lightweight PDF and XPS viewer.