Postino allows you to generate Italian postal payment forms in PDF format using Prawn.

Prawn report is a class repository wich uses prawn gem capabilities to generate PDF documents in order to make it easy to create real life reports.

Poleica can convert docs and images to PDF and PNG, it can be extended to handle a lot of converters

Prawn itself provides only linear and radial gradients. This is the more advanced shadings that PDF spec defines.

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.

A comprehensive revision history tracking system for asciidoctor-pdf that automatically creates a grouped, formatted table of document changes with clickable page numbers, xrefstyle support, and extensive customization options.

Write your resume once in machine-readable YAML format and export it to HTML or PDF using custom themes.

Ruby interface for Adobe PDF Services API Document Generation

PDF rending plugin for Rails using FlyingSaucer originally from Tim Riley, changes from Nick Sieger and Yehuda Katz for rails3.

A very simple tool to index scanned documents in either PDF or image format

Interactive tool to rename pdfs based on author/title/year.

Ruby gem to generate automated test reports for academic assignments with HTML templates, CSV export, optional PDF (via prawn), class-wide reporting, and basic Jaccard code similarity.

Builds a database of bank account transaction history by reading PDF bank statements, and provides a simple web interface for browsing data.

Reads hours from a Google Spreadsheet and generates a PDF invoice.

Experimental PDF component library

Library (Docsplit wrapper) for text extraction from pdf, doc/x, txt files with OpenOffice