Radiantcms, a Ruby on Rails CMS
Ruby on Rails likes efficiency
Radiantcms is a CMS developed with Ruby on Rail technique. The mission of Radiantcms is:
Radiant is a no-fluff, open source content management system designed for small teams.
Compared with other Ruby on Rails CMS systems, Radiantcms has pretty complete documentation, development tutorial, as well as the nice demo. It is also very impressive that Radiantcms already has had many extensions, for example, templates, page-fields, Ad banners. You can find most of development resources on Radiantcms Github.