Rumble_demoapp is a project mainly written in RUBY and JAVASCRIPT, it's free.
Rails Rumble 2010 Demo App
= Rails Rumble PostageApp Demo App
This is a simple demonstration app for PostageApp. To make it work you will need to configure config/initializers/postageapp.rb with your API key:
PostageApp.configure do |config|
config.api_key = 'EXAMPLE_API_KEY'
end
Several templates are required for this to work, but they are described in the blog post:
http://blog.postageapp.com/2010/10/rails-rumble/