| Core |
| Exception |
| FilterIterator |
| Gateway |
| Http |
| Model |
| Plugin |
| Repository |
| ServiceLocator |
| Test |
| Event | the Event class for implementing a hook/event system |
| Exception | the Exception class |
| Registry | the Registry class for implementing a registry |
| ServiceLocator | the Service Locator class |
| Session | the Session class for implementing a session |
| Utility | the Registry class for implementing a registry |