Create PDF files from almost any Windows application and more with PDFCreator.
PDFCreator easily creates PDFs from any print-ready program. It is very secure and can even encrypt PDFs to protect them from being accessed. That's not all for security; other features include digitally signing your PDFs, ensuring you are the author, and it hasn't been otherwise modified. You can also merge PDF files, autosave your folders and filenames on your criteria, and much more. Some of these options depend on what you choose when you install PDFCreator.
Finally, while it might be called PDFCreator, it can also create much more, including PNG, JPG, BMP, and many other graphics formats.
There are Nag-Screens, and it offers Avast! Free Antivirus during installation - remember that third-party offers often change, so always pay attention during installation. PDFCreator will remain free forever. You may use it at home or in your company and even give it to your friends and colleagues. You may access the source code and compile it yourself, as long as it stays under the AGPL.