Eventually this may be a markdown to PDF, ePUB, MOBI processor. For now it's just something I'm playing around with, so use at your own risk

stripe_invoice adds PDF views and automated emails to your Koudoku-based application

Easily create PDF and Excel files from html in your Ruby application using the DocRaptor API.

Sinatra extension to add support for pdf rendering with Prawn templates.

Slaw is a lightweight library for rendering and generating Akoma Ntoso acts from plain text and PDF documents.

A gem that provides a client interface for the Gotenberg PDF generate service

A Prawn PDF component which adds basic HTML support

Uses weasyprint to create PDFs using HTML

Copyleaks detects plagiarism and checks content distribution online. Use Copyleaks to find out if textual content is original and if it has been used before. With Copyleaks cloud publishers, academics, and more can scan files (pdf, doc, docx, ocr...), URLs and free text for plagiarism check.

XHTML to PDF using Flying Saucer java library

Optical mark recognition of multiple-choice tests and surveys. Low-level ruby library to generate response sheets in PDF form and to automatically score manually filled-out forms.

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.

With this SDK, you can seamlessly integrate GroupDocs’ document collaboration tools into your Ruby web or mobile application. The tools enable end users to view, securely share, collaboratively annotate, e-sign, assemble, convert and compare over 50 common document and image types (including PDF,...

Creates polish invoices and proforms as HTML or PDF files

A HTML5 client-side solution for generating PDFs.

simple wrapper around CLI for extracting text from PDF and Word documents

Convert office document to pdf and swf

Bulk rename of ebook files (pdf, epub, mobi) based on embedded metadata

Generate PDF from HTML using PhantomJS

Attach files (images, videos, pdfs, txts, zips and etc) to a MongoMapper record. You can choose if you to store it on file system or GridFS.