This gem uses OpenOffice and pdftk to convert, split, join, fill and copy files. It may be usefull if you have many documents to work with. It is not realy fast solution and it depend on istalled software

Statosio generate charts in a .svg format. Works with prawn-svg to generate .pdf documents.

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

Book boilerplate to generate books as EPUB, MOBI, and PDF from simple Markdown text files. Or from HTML. Or from LaTeX. Or mixed.