| DataAccessFunctions | Implementation of data access to main Thelia objects (users, cart, etc.) |
| Security | The class all Smarty Thelia plugin shoud extend |
| TheliaLoop | The class all Smarty Thelia plugin shoud extend |
| Module | The class all Smarty Thelia plugin shoud extend |
| Assetic | The class all Smarty Thelia plugin shoud extend |
| Translation | The class all Smarty Thelia plugin shoud extend |
| TheliaSyntax | Class TheliaSyntax |
| Form | Plugin for smarty defining blocks and functions for using Form display. |
| UrlGenerator | The class all Smarty Thelia plugin shoud extend |