Nota do livro: 10.
- PDF Labs
- Filling out PDF Forms with PDFtk and PHP
- Prawn: Fast, Nimble PDF Generation For Ruby
- The PDF::Reader library implements a PDF parser conforming as much as possible to the PDF specification from Adobe.
- PDFBox – How to read PDF file in Java
- PSPDFKit – The leading cross-platform solution for integrating PDFs into your app.