CUPS-PDF is a backend module for CUPS(Mac OS X's printing system) by Volker C. Behr that, rather than printing to a device, prints straight to PDF files.

Why use this rather than a simple "Save as PDF" in the print dialog?
• Pressing return is faster.
• Batch-print through the writer to convert documents to PDF.
• Common save location for all generated PDFs.
• Share a PDF printer so you can print to it from another computer.

Installation:
• Install the package.
• Open System Preferences and go to Printing.
• Click on Add Printer (the + at the bottom).
• "CUPS-PDF" should be in the list, select it.
• Select "Postscript" from the "Print Using" menu and pick "Generic postscript color printer"
• Click Add

Use:
• Print to the printer normally. The output will be in /Users/Shared/CUPS-PDF in a folder with your user account's name. Feel free to make an alias to this folder on your desktop or put it in the Dock.

Requirements:
OS X 10.6+
Intel