Showoff-understanding-mongoid is a project mainly written in Ruby, it's free.
My understanding mongoid showoff presentation
This is a ShowOff presentation (http://github.com/schacon/showoff)
If you want to see it, you need to install showoff and then run it in this directory:
$ gem install showoff $ git clone git://github.com/flyerhzm/showoff-understanding-mongoid.git $ cd showoff-understanding-mongoid $ showoff
Then you should be able to go to http://localhost:9090 to view the presentation.