Creating PDF files without purchasing software is achievable through various free options. LaTeX typesetting programs and OpenOffice are recommended for generating PDFs at no cost. Virtual printer software like PrimoPDF and Bullzip also allow users to print documents directly to PDF format. While Adobe's Acrobat software is popular, it is often criticized for its cost. Users have noted that some free software may come with additional offers or privacy concerns during installation. Additionally, Word 2007 includes a feature for saving documents as PDFs, which may be accessible to those who already own the software. The PDF format has become an open standard, enabling the development of various free tools for PDF creation, such as Ghostscript and PDFCreator. Overall, there are numerous legitimate free alternatives available for creating PDF files without incurring costs.