Merge tones in PDF made by DCL (Dennou Club Library) ver. 6

jpeg2pdf is a free program that converts a directory of JPEG files to a PDF file.

Compiles a kramdown file to pdf and html. This can be done with the kramdown gem, but this gem just simplifies the interface

Crawl lecture websites and fetch the PDFs automatically. It currently supports the studium.kit.edu and other HTTP password protected sites.

Knigodej gem is a tool to make a PDF, and DJVU books from the XCF (GIMP image) source

Turn your LinkedIn Profile into a professional resume in many formats (PDF / HTML5 / LaTeX / Asciidoc)

This gem crawls and parses the the list of lobbyists which is published as a PDF by the German Bundestag.

Generates docummentation in pdf format using simple DSL

Meta Reports provides a meta language and data structure to create a 'meta' report. This report can then be exported into any format desired. MR provides HTML, PDF, and XLSX exports built in.

Taking a 12-tone row generated from user input, Webern will create the full matrix based upon this row, and then output all 48 possible rows created by that matrix out to a .pdf file using the LilyPond notational language.

PalletePNG is a pure-ruby library that make it possible to render the transparent of a pallete-based PNG in PDF by converting the color-mode of the image.

Allows a user to specify a list of gaming cards in a spreadsheet, then generate a PDF suitable for print-and-play games and prototyping.

A command-line utility for a Paperless that apply rules in order to auto-sort notes into supported services such as Finder, Evernote, DevonThink and PDFPen

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

Simple tool for converting payoneer pdf report to csv file

Generate sets of labels or stickers programmatically using Prawn PDF.

create pdf labels sheet defining template and label start point

PrinceXML is a PDF generator that takes html,css input. This gem is a simple wrapper for use with ruby apps

Generats png images of progress bars, useful for web pages or use in pdf files.

Generate PDF/HTML from articles posted on qiita.com. Uses wkhtmltopdf on the back-end which renders HTML using Webkit.