Mco_dashboard_example is a project mainly written in Ruby, it's free.
How to use sinatra and mcollective to build a dashboard
This is an example sinatra application to demonstrate building a dashboard for real time system information.
Requires the following gems:
gem install sinatra gem install sinatra-respond_to
The example actions require:
puppetd mcollective agent: http://projects.puppetlabs.com/projects/mcollective-plugins/wiki/AgentPuppetd
nrpe mcollective agent: https://github.com/maguec/devops/tree/master/mcollective/nrpe