RailsDB is a web application written in Ruby using the Ruby on Rails web framework to provide a generic interface to popular open source databases such as MySQL, PostgreSQL, and SQLite.
RPetstore is a Rails implementation of the iBatis JPetstore. It's goal is to show best practices for building web applications with the Ruby on Rails framework.
Based on the Jakarta Struts project, the Ruby Web Application framework is a framework for developing web/wap applications founded in the Ruby programming language.