Open source web apps with Rails

Does anyone know of any good open source website packages for Rails? I’m
looking for several of the following to compare for a couple of business
ideas:

Blog Engine
Community site (with forums)
Social News site (like Digg)
Ecommerce
General purpose web content (like DotNetNuke)

Does anyone have any suggestions for any of these? As good of a
framework as rails seems to be, I know there have to be some really
slick projects out there. What would you suggest downloading and
experimenting with?

Yes, even I blog now:

http://willsmentaldebris.blogspot.com/


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The other day I discovered this really cool resource for finding stuff
on the web. It’s called Google. I don’t know…maybe you’ve heard of
it? :slight_smile:

http://www.google.com/search?client=safari&rls=en&q=open+source+rails+projects&ie=UTF-8&oe=UTF-8

The number one result:
http://wiki.rubyonrails.org/rails/pages/OpenSourceProjects