Enterprises love the social collaboration of Chatter, especially since Chatter is tightly aligned with enterprise data in Salesforce. Many companies that integrate their legacy data into Salesforce want to extend Chatter to these mission critical, integrated systems allowing employees to engage in communities right where they work. Join us as Appirio shows how you can use Chatter to engage user communities in external systems using the Chatter UI in the cloud to plug Chatter into external systems with just one line of code. We'll walk through architectural patterns for avoiding browser cross-domain restrictions, access Chatter APIs from the browser, then dive deep into the implementation details of the AngularJS User Interface, NodeJS Chatter Proxy server on Heroku, use of Oauth2, Heroku platform considerations, and specific Chatter REST APIs used.