Tracker-Dashboard is a project mainly written in RUBY and JAVASCRIPT, it's free.
Helps manage individual streams of development within a large project on Pivotal Tracker
Provides a view into Pivotal Tracker projects for project managers.
See http://unpackingtech.blogspot.com/2011/10/trackerdashboard.html for details.
This app is running at: http://trackerdashboard.heroku.com/