Origami is a pure Ruby library to parse, modify and generate PDF documents.

Squid expands Prawn providing method to easily draw graphs in PDF files.

mn2pdf converts Metanorma XML into PDF. This gem is a wrapper around mn2pdf.jar available from https://github.com/metanorma/mn2pdf, with versions matching the JAR file.

bookshop is an agile book publishing framework for building pdf and (e)books using HTML5, CSS, and JavaScript. The framework is optimized to help publishers, editors, and authors quickly ramp-up, allowing them to jump in and develop their html-to-pdf/(e)book flows by favoring convention over configuration, setting them up with best-practices, standards and tools from the start.

Blobsterix is a transcoding, caching, storage server that can transform your blobs (images, pdf, ...) at request time.

PDF generator (from HTML) gem for Ruby on Rails

An adapter for format_parser to parse PDF files using pdf-reader. Replaces the standard PDF parser module.

The Alien device to convert Markdown and Textile files to HTML or PDF.

Convert office documents to PDF using LibreOffice.

A gem for plugging pdf.js into a Rails application

A Ruby frontend to the pdftk binary, including FDF and XFDF creation. Also works with the PDFTK Java port. Just pass your template and a hash of data to fill in.

Maruku is a Markdown interpreter in Ruby. It features native export to HTML and PDF (via Latex). The output is really beautiful!

A Jekyll plugin for generating PDFs from your pages, posts & documents.

使用 Markdown 编写书籍内容，通过 burr 将其转换成 PDF，ePub 和 Mobi 格式电子书。

Provides a programatic way to check a PDF file conforms to standards like PDF-X/1a

Read text and metadata from files and documents (.doc, .docx, .pages, .odt, .rtf, .pdf)

A wrapper for the PrinceXML PDF generation library.

A wrapper for the PrinceXML PDF generation library.

A wrapper for the PrinceXML PDF generation library.

This gem allows you to render SVG directly into a PDF using the 'prawn' gem. Since PDF is vector-based, you'll get nice scaled graphics if you use SVG instead of an image.