title: What's the best option for searching in Ruby on Rails?
body: <p>There are several plugin options for building a search engine into your Ruby on Rails application.  Which of these is the best?</p>
  
  <ul>
  <li><a href="http://ts.freelancing-gods.com/" rel="noreferrer">Thinking Sphinx</a></li>
  <li><a href="http://blog.evanweaver.com/files/doc/fauna/ultrasphinx/files/README.html" rel="noreferrer">UltraSphinx</a></li>
  <li><a href="http://seattlerb.rubyforge.org/Sphincter/" rel="noreferrer">Sphincter</a></li>
  <li><a href="http://www.datanoise.com/articles/2007/3/23/acts_as_sphinx-plugin" rel="noreferrer">acts_as_sphinx</a></li>
  <li><a href="http://projects.jkraemer.net/acts_as_ferret/" rel="noreferrer">acts_as_ferret</a></li>
  <li><a href="http://ferret.davebalmain.com/trac/" rel="noreferrer">Ferret</a></li>
  <li><a href="http://locomotivation.com/2008/07/23/simple-ruby-on-rails-full-text-search-using-xapian" rel="noreferrer">acts_as_xapian</a></li>
  <li><a href="http://github.com/railsfreaks/acts_as_solr/tree/master" rel="noreferrer">acts_as_solr</a></li>
  <li><a href="http://hyperestraier.sourceforge.net/" rel="noreferrer">Hyper Estraier</a></li>
  </ul>