| Application | The Silex framework class. |
| ConstraintValidatorFactory | Uses a service container to create constraint validators with dependencies. |
| Controller | A wrapper for a controller, mapped to a route. |
| ControllerCollection | Builds Silex controllers. |
| ControllerResolver | Adds Application as a valid argument for controllers. |
| ExceptionHandler | Defaults exception handler. |
| ExceptionListenerWrapper | Wraps exception listeners. |
| HttpCache | HTTP Cache extension to allow using the run() shortcut. |
| LazyUrlMatcher | Implements a lazy UrlMatcher. |
| RedirectableUrlMatcher | Implements the RedirectableUrlMatcherInterface for Silex. |
| Route | A wrapper for a controller, mapped to a route. |
| ServiceControllerResolver | Enables name_of_service:method_name syntax for declaring controllers. |
| WebTestCase | WebTestCase is the base class for functional tests. |
Interfaces
| ControllerProviderInterface | Interface for controller providers. |
| ServiceProviderInterface | Interface that must implement all Silex service providers. |