Kit - The Community and Content Management System
DSC has published the Kit CCMS Ruby on Rails engine as an open source Gem. All the functionality you see here on WorkingWithRails, including the large, searchable databases of People, Companies and Rails sites, the job board and the discussion forums are already created using the standard, built-in functionality of Kit.
This means that you can create your own online community and have a fully functional site running in no time at all. As a Rails developer you'll appreciate the flexibility of the system which does not constrain you in any way. And as its a Rails engine you can use it as CMS, with a wide range of online community functions, in your projects.
WorkingWithRails is an example of the functionality provided by Kit. Read more about WorkingWithRails.