Suggest application

Hello!

We are developing Helicon Zoo – a repository of web frameworks and
applications for Windows and IIS ( http://www.helicontech.com/zoo/gallery/
). Currently we have Ruby 1.9.2 and 1.8.7 in the repository as well as
various Rails 3 and 2 running under IIS 7. Now we are filling
repository with various Ruby on Rails applications. We already have
included Redmine, Refinery CMS and Radiant CMS, planning to add Spree.
And now we need your suggestion on what other open source Ruby on
Rails applications you'd like to see in this repository?

Thank you!