Any non-rails ruby forum application out there?

I have a rather complete application based on sinatra. I feel in need for an easy to integrate forum module (code, extension, etc.). Running a parallel Rails application is not an option on my tiny VPS plan (I even use redis to keep a small footpr开发者_JS百科int). A sinatra based forum would be great news. Thanks

look for something that is Rack compatible

I liked lain's suggestion and started looking for a Rack based forum. Otherwise, I might use tinyfora https://github.com/craigp/tinyfora

A minimalist experiment in writing a small, fast forum app, really just to get to grips with Sinatra, DataMapper, Haml and Sass.

what about a hosted solution such as http://www.vanillaforums.com/ or .org for the opensource host it yourself.

easy to integrate forum module (code, extension, etc.)

Maybe you just can create the forum inside your application itself.
Integrating different applications often takes more time and effort than creating a new, simple one.

With tools like Ruby, Sinatra/Rails you can be done with integrated forum in days (if not hours).