PDF Conversion and Reading

Cool PDF Reader

The world's smallest PDF viewer/reader to view, print, and convert PDF files.
http://www.pdf2exe.com/reader.html
Download
http://www.pdf2exe.com/CoolPDFReader.exe

CutePDF Printer Driver

Create PDF files from any Windows application that supports printing.
http://www.cutepdf.com/products/cutepdf/Writer.asp
Requires Ghostscript:
http://www.ghostscript.com/

PDFTK Builder & other PDF Resources

PDFTK Builder - Collate, Split, Apply Background to, and Password Protect PDF files.
http://angusj.com/pdftkb/
http://angusj.com/pdftkb/pdftkb_setup.exe

Foxitreader: Free PDF Reader

Small  and fast PDF reader. There is no longer any need to have Adobe Acrobat Reader installed.
https://www.foxitsoftware.com/products/pdf-reader/