grails-app- top level directory for Groovy sourcesconf- Configuration sources.controllers- Web controllers - The C in MVC.domain- The application domain.i18n- Support for internationalization (i18n).services- The service layer.taglib- Tag libraries.views- Groovy Server Pages.scripts- Gant scripts.src- Supporting sourcesgroovy- Other Groovy sourcesjava- Other Java sourcestest- Unit and integration tests.