QueryBuilder is an interpreter for the "pseudo sql" language. This language can be used for two purposes: 1. protect your database from illegal SQL by securing queries 2. ease writing complex relational queries by abstracting table internals

RubyLess is an interpreter for "safe ruby". The idea is to transform some "unsafe" ruby code into safe, type checked ruby, eventually rewriting some variables or methods.

Provides a powerful templating language based on xhtml for rails

zena is a Ruby on Rails CMS (content managment system) with a focus on usability, ease of customization and web 2.0 goodness (application like behaviour).