In all our careers at some point we’ll have multiple web applications or services we need to be able to integrate; whether that be as simple as sharing sessions or more complex such as manipulating HTTP responses provided by applications in libraries. Integration is hard but for frameworks, libraries and applications interoperability is an ever increasing goal. In this talk we’ll discuss how we can go further with interoperability to make your life easier: how you can make Drupal, phpBB and eZ Publish integrate with your Symfony web app; how you can use Symfony Components and Zend Framework modules side by side; and about decoupling your applications from any one specific library by depending on interfaces instead of implementations.