Virtual Print Engine Community Edition is a report generator, print engine, and PDF library. It allows you to create documents like reports, forms, drawings, and diagrams on-the-fly by placing objects like text, lines, and bitmaps in any position using function calls. Flexible dynamic layouts are supported. Documents containing tens of thousands of pages can be created with a very small memory footprint. New documents can be assembled from several single documents.
Makecheque is a tool (written in Ruby) to print bank cheques, either using bank-supplied stationey, or blank check paper (in conjuntion with a MICR font and perhaps special laser toner). It is intended to be used as part of an interactive bookkeeping system. Makecheque quickly and easily prints large batches of checks based on textual format specifications given as standard input and emits ready-for-printer Postscript on standard output.
ruby-tmpl is used for the online and offline creation of HTML, XML, and email documents. Like many other templating languages, ruby-tmpl lets you abstract the presentation from the actual content of a document. However, unlike other templating languages, ruby-tmpl also lets you perform offline processing of documents so that you can have your Web server serve static content created by templates as well as dynamic content. The templating language itself is fully XML-compliant and can safely be embedded in XML documents.