Program to create non-Word or Excel PDFs.
Free software for Windows that allows scanning and saving documents in PDF format.
Lightweight, fast, and open-source PDF viewer and toolkit that allows rendering PDF, XPS, and other formats with high fidelity and performance.
Adobe Acrobat Reader allows you to view, comment, fill out, and sign PDFs on multiple platforms.

Utility to extract and merge pages from PDF files.
Create, edit, convert, and view PDF documents.