Use this PHP SDK to easily install SendGrid's Event API. SendGrid's Event API allows you to do things like remove unsubscribes, respond to spam reports, identify bounced email addresses, or create analytics of your email program.
Google Analytics, the feature-rich website analytics tool, has been available for free to web developers since 2006. However, access to the service has been completely browser-based, limiting the ability for developers to create new reporting tools, widgets, or clients for mobile devices. After a long wait, the popular service has finally opened up now that Google has announced the availability of the Analytics Data Export API (our Google Analytics API profile).