Open Source PDF Generation Libraries

iText is an open-source PDF library available for Java and .NET (C#). iText allows you to effortlessly generate and manipulate standards-compliant PDF documents with a powerful and feature-rich SDK. With iText, you can create archivable and accessible PDFs, split and merge documents, fill and flatten forms, digitally sign documents, and more. iText add-ons enable additional functionality, such as PDF creation from HTML templates, secure redaction, OCR, and much more. The latest versions of iText build on the success of previous versions and feature an improved document engine, high and low-level programming capabilities, and a more efficient modular structure. iText represents the next level for developers looking to leverage PDF in document workflows. The main project page for iText is now on GitHub, and all the latest releases, code samples, open source add-ons and tools, etc. can be found at https://github.com/itext/.

Early Access iText, a PDF generation library in Java

dompdf - the PHP 5 HTML to PDF converter. dompdf is a (mostly) CSS compliant HTML rendering engine written in PHP. It supports external stylesheets, inline style tags, and the style attributes of individual HTML elements. Requires PHP 5.

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The Nheengatu Project is a Java library that provides HTML markup abstraction allowing you to reutilize it to generate PDF files, OpenOffice documents, image files, etc. The goal of this project is to maximize the use of HTML markup procedures.

PDFLib-free PDF creation using PHP. It has interface compatible with php pdf creator (pdf-php library). Implements most of Adobe recommended features like PageTrees, Outlines, and so on.

Toolkit e-formulieren is een opensource toolkit voor het op een gebruikersvriendelijke manier kunnen maken en onderhouden van e-formulieren. De Toolkit maakt gebruik van Orbeon, en ondersteunt XForms-compliant e-formulieren, evt. met voorinvulling.

iText Programming Tutorials. Example code and detail explanation on how to generate Adobe PDF document with iText API. Example of AcroForm, bookmark, anchor, insert images, generate PDF with Java App, JSP or Servlet, create PDF table and etc.