Adobe Acrobat Reader DC is the industry standard for viewing, printing, signing and commenting on PDF documents.

PDF Mod is a simple application for modifying PDF documents. You can reorder, rotate, and remove pages, export images from a document.

PDF-XChange Editor a small, fast, feature-rich FREE PDF editor/viewer.

PDFescape is an advertising and fee supported, web-based PDF editor program written in JavaScript, HTML, CSS and ASP.

PDF Studio is a multi-platform PDF editor.

Nitro Pro gives you the tools to do more with your documents.

PDF-Tools is a flexible & power wizard-driven application for batch creating, manipulating, and modifying PDF files.

PDFedit is a free PDF editor for Unix-like operating systems (including Cygwin on top of Windows). It does not support editing protected or encrypted PDF file…

PDFill allows users to alter existing PDFs or create documents from scratch.

Skim is a PDF reader and note-taker for OS X. It is designed to help you read and annotate scientific papers in PDF.