Piwik-Tracker
http://github.com/jkraemer/piwik-tracker
Ruby client library for the Piwik opensource web analytics application.
With Piwik-Tracker you can record visits, page views and goal conversions in a Piwik server from within any ruby application.
Think of it as a Ruby version of the piwik.js standard Tracking API. For more information, see http://piwik.org/docs/tracking-api/
Inspired by the PiwikTracker.php script that comes with Piwik.