library for tracking personas (i.e., characters), plus extension modules,

Tosca is an Open Source Issue Tracker. It is designed to be user friendly, professional and multi-projects. It is made with Ruby on Rails.

Ruport is a REAP framework specialized for business reporting. It provides a custom toolkit that has features such as database interaction, data manipulation, extensible formatting, and flexible report generation.

Ruty is a template engine heavily inspired by the Django and Jinja Template Engine. It supports template inheritance, template inclusion and most of the tags supported by Jinja/Django.

Slim is a template language whose goal is to reduce the view syntax to the essential parts without becoming cryptic.

CodeRay is fast syntax highlighter for Ruby and other languages.It produces colorful, valid XHTML.CodeRay's design goal: simple, uncached code highlighting for your board/wiki/blog/doc/website.

webgen is an easy-to-use, extensible web site generator in Ruby. It is used to generate static web sites from templates and content files and provides tools for generating dynamic content like menus.

Ruby-Bombe is a thin wrapper that allows access to plain files, memory-mapped files, byte arrays, compressed files, network files and so on so forth. All through the same interface.

It allows seamless access to different type of media by emulating where possible the needed functions, and by providing a consistent interface even in term of error handling through exceptions....

A simple Bugzilla (and Issuezilla) trackers client, allows you to get a basic summary of a bug (number, title, product/component, resolution, reporter and assignee) in IRC, by using the XML data related to the bug.

Net::Amazon::S3 is a simple, easy to use Ruby implementation of the Amazon S3 REST API.