PDFWalker is a GTK frontend to explore the internals of a PDF document with Origami

Convert Pivotal Tracker Stories to 4x6 PDF for printing so that you can stick the card to your story board

Arrange pages of existing PDF documents so they fit on a single page, and so they can be folded and cut to produce signatures that may then be assembled to form a bound book.

A gem for plugging pdf.js into a Rails application

Uses command-line pdftohtml tools to convert PDF files to HTML.

This is the beginnings of a prawn extension for adding interactive forms to PDFs.

A native client library for the DocRaptor HTML to PDF/XLS service.

A Rails renderer for Prawn PDFs.

A ruby gem for converting PDF documents into a series of images. This module is based off poppler_utils and ImageMagick.

a library that can read structured and positional text from PDFs. Ideal for asembling structured data from invoices and the like.

A pure Ruby PDF document creation library.

Extract citations from PDFs.

Prawn::Icon provides various icon fonts including FontAwesome, PaymentFont and Foundation Icons for use with the Prawn PDF toolkit.

Ruby Stats is a port of the statistics libraries from PHPMath. Probability distributions include binomial, beta, and normal distributions with PDF, CDF and inverse CDF as well as Fisher's Exact Test.

DANFE pdf generator for Brazilian invoices.

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.

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

A thin wrapper above Prawn that makes it easier to build compentized PDFs

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

Convert office document to pdf and swf