PDF's for Linux

Foxit Reader for desktop Linux:
http://www.foxitsoftware.com/pdf/desklinux/

Adobe Reader for Linux and Solaris:
http://www.adobe.com/support/downloads/product.jsp?product=10&platform=unix

A document viewer, called Evince, for multiple document formats.
It currently supports pdf, postscript, djvu, tiff and dvi.
http://www.gnome.org/projects/evince/