I like Bullzip PDF. It’s simple, straight-forward, and free. I highly recommended it for your daily usage. It’s free for both personal and commercial usage.

CONS: The commercial usage is only limited to 10 users.

Features:

• Print to PDF from almost any Windows program.
• Runs on Microsoft Windows 2000/XP/XP x64/2003/2003 x64/Vista/Vista x64/2008/Windows 7.
• Supports 64-bit operating systems.
• Direct output to the same file each time or prompt for destination.
• Control if the printer should ask if you want to see the resulting PDF document.
• Control output and prompts programmatically.
• Setup can run unattended.
• Graphical user interface.
• Password protect PDF documents.
• 128/40 bit encryption.
• Quality settings (screen, printer, ebook, prepress).
• Set document properties.
• Watermark text, size, rotation, and transparency.
• Superimpose/background documents.
• Appending/prepending documents.
• User interface control.
• Command line interface to all settings.
• COM/ActiveX interface for programmatic control.
• Support for Citrix MetaFrame
• Support for Windows Terminal Server
• Multiple output types supported: BMP, JPEG, PCX, PDF, PNG, and TIFF

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Save the environment by printing to PDF instead of actual paper!