Ruby on Rails CMS and Blogging Systems

Lingua: http://www.linguaproject.net/

Top 20 Ruby on Rails Content Management Systems CMS Tools:
http://www.rubyonrailsblog.com/articles/2006/08/28/top-20-ruby-on-rails-content-management-systems-cms


Mephisto: http://mephistoblog.com/

Typo: http://typosphere.org/