A free, cross platform, open-sourced software library for generating PDF. [zlib]

High performance library for creating, modiyfing and parsing PDF files in C++ [Apache-2.0] website

A simple C library for reading and writing PDF files. [Apache-2] website

Library to create and edit PDF documents that uses GDI functions through a device context to draw the page content. [LGPL v3 and zlib]

A lightweight PDF, XPS, and E-book viewer. [AGPL/Proprietary]

PDF generation and rendering library. [BSD-3-Clause]

A library to work with the PDF file format. [LGPL]

Open-source multi-backend PDF rendering library based on the xpdf-3.0 code base. [GPLv2/GPLv3]

Xpdf is a free PDF viewer and toolkit, including a text extractor, image converter, HTML converter, and more. [GPL v2/GPL v3]

An easy-to-use PDF generation library. [Commercial]