The following are resource links for utilizing Ruby with Salesforce

Useful gems

• databasedotcom - "official" gem from Heroku / Salesforce. This gem provides basic access to Salesforce, Database.com and the Chatter api.
• databasedotcom-rails - unofficial extension to databasedotcom gem that provides automatic creation of model objects from Salesforce objects simply by writing controllers.
• RestForce - unofficial gem for access to salesforce and chatter. Far more advanced than databasedotcom, and the recommended integration gem.