iwyg is a social exchange system built in rails. this system can be seen on www.iwyg.net
Just clone and bundle:
git clone https://github.com/heaven7/iwyg
cd iwyg
bundle install
Rename or copy the *.sample.yml files in the config directory and change them to your needs:
database.sample.yml => database.yml
email.sample.yml => email.yml
settings.sample.yml => settings.yml
After this you can build up the database, migrate and seed to it:
rake db:create
rake db:migrate
rake db:seed