| App | This is the main class for the ReportMill app. | 
| RBApp | This class provides a bunch of core functionality for loading and saving Ribs documents. | 
| RBAppleOnly | Does special Mac-only initialization. | 
| RBEditor | This RMEditor subclass customizes RMEditor behavior for Ribs. | 
| RBEditorDnD | Handles drop listener stuff for an RBEditor. | 
| RBEditorShapePainter | This ribs shape painter adds support for clipping child shapes (like for scrollpane). | 
| RBEditorUI | This RMEditor subclass customizes RMEditor behavior for Ribs. | 
| RBTester | Simple class to run Ribs preview apps. | 
| RBTester.GlassPane | An inner class to be a glass pane for the editor while testing rib files in editor window. | 
| Welcome | This class provides the welcome panel for RM. |