| Duplicator | Utility class, which provides basic functionality for object duplication (cloning). |
| FXDContent | A class representing content loaded from an FXD content file or FXZ archive, together with ID strings used to identify individual graphic objects. |
| FXDLoader | This class loads JavaFX content files--either FXD (plain text) or FXZ (a compressed archive with embedded binary assets). |
| FXDNode | A visual node representing FXD/FXZ graphics. |