Library to create navigations for Ruby web applications

 Easily create multilevel navigations for your Rails, Sinatra or Padrino
 applications. The navigation is defined in a single configuration file. It
 supports automatic as well as explicit highlighting of the currently active
 navigation through regular expressions.
 .
 If you are implementing a Sinatra or Padrino web application, you should
 consider also installing ruby-sinatra-simple-navigation.