... I send out a list of most interesting libraries and apps in the "Rails" section
to about 1100 subscribers.
Do you want it too?
Subscribe to "Rails"
Forum web application, an example for from Rails to Go (Revel)
A platform for community discussion. Free, open, simple.
The best Rails forums engine ever.
Fantastic forum software for Rails 3
Totally sweet Ruby on Rails-based forum software
A free and open source Ruby on Rails forum software under BSD license