Tog: A New Way To Social Network-ify Your Rails Apps
Tog is a new extensible open source social networking platform that you can add to your Rails apps developed by Keras Software Development. It
Unlike the incumbent Community Engine, Tog is not a plugin - nor is it a stand alone application like Lovd By Less or Insoshi. It's a collection of many plugins and scripts that can "togify" your existing application - adding the social networking features straight in. For example, the tog_social plugin adds basic social networking support such as profiles, groups, and "following." tog_mail, on the other hand, adds internal messaging / mail folders.
Tog's developers have done a good job putting together a cohesive official Web site, so it's easy to learn more. They also point to a number of existing sites that are using Tog in some capacity.