PDF

from wikipedia

Improving access to electronic information for people with disabilities

The AdobeR AcrobatR family of products provides the power to deliver documents that give business, creative, and technical professionals an intelligent way to get the job done.

Plugins, utilities, useful tips, and newsletters

an interpreter for the PostScript language and for PDF, and related software and documentation

Xpdf is an open source viewer for Portable Document Format (PDF) files.

Control your printing and create PDF documents with our award-winning products

BinaryThing provides software and information to facilitate the creation, manipulation and interchange of electronic documents.

PDF Tools AG is a world leader in PDF (The Adobe Portable Document Format) programming technology, delivering reliable PDF products to international customers in virtually all market segments.

Jaws PDF Technologies are a suite of products developed by Global Graphics Software for PDF creation, view, mark-up, assembly, delivery and output. The following products are available to enterprise, government and educational customers.