PDF4Free 

Free PDF creator, PDF writer and PDF converter for Windows NT4/2000/XP/Server 2003. This tool installs itself as a print driver, all you have to do is to click "Print" from your application to create PDF. Other files can be converted to PDF filles.
pdf create generate convert conversion driver writer printer windows xp acrobat pdf4u batch

PDF4U 

Create PDF files from any Windows application running on Windows NT(SP3+), Windows 2000, Windows XP and Windows Server 2003. The software installs itself as a print driver, all you have to do is to click "Print" from your application to create PDF.
pdf create generate convert conversion driver writer printer windows xp acrobat pdf4u batch

PDF4U Pro 

Create PDF files from any Windows application running on Windows NT(SP3+), Windows 2000, Windows XP and Windows Server 2003. The software installs itself as a print driver, all you have to do is to click "Print" from your application to create PDF.
pdf create generate convert conversion driver writer printer windows xp acrobat pdf4u batch