| Builder | The UI builder connected to a window or dialog |
| Client | The UI client containing actions and layout of menus and toolstrips |
| GradientWidget | Widget with styled gradient background |
| MacStyle | Better Qt style for Mac |
| ToolStrip | Widget containing tool buttons |
| ToolStripAction | Action with extended properties |
| WindowsStyle | Modern Qt style for Windows |
1.7.1