Free and open-source graphical interface for pdftk (PDF Toolkit), a command-line tool used to manipulate PDF files.
Program to create non-Word or Excel PDFs.
Adobe Acrobat Reader allows you to view, comment, fill out, and sign PDFs on multiple platforms.
Free software that allows you to merge multiple pages of PDF documents into a single page.
Create PDF files from virtually any application.
Free software for Windows that allows scanning and saving documents in PDF format.