This page provides a way of navigating Qt's classes by grouping related classes together. Some classes may appear in more than one group.
| Group | Description |
| Abstract Widget Classes | Abstract widget classes usable through subclassing. |
| Accessibility Classes | Classes that provide support for accessibility. |
| Advanced Widgets | Advanced GUI widgets such as tab widgets and progress bars. |
| Basic Widgets | Basic GUI widgets such as buttons, comboboxes and scrollbars. |
| Database Classes | Database related classes, e.g. for SQL databases. |
| Date and Time Classes | Classes for handling date and time. |
| Desktop Environment Classes | Classes for interacting with the user's desktop environment. |
| Drag and Drop | Classes dealing with drag and drop and mime type encoding and decoding. |
| Environment Classes | Classes providing various global services such as event handling, access to system settings and internationalization. |
| Event Classes | Classes used to create and handle events. |
| Non-GUI Classes | Collection classes such as list, queue, stack and string, along with other classes that can be used without needing QApplication. |
| Multimedia, Graphics, and Printing | Classes that provide support for graphics (2D, and with OpenGL, 3D), image encoding, decoding, and manipulation, sound, animation, printing, etc. |
| Help System | Classes used to provide online-help for applications. |
| Layout Management | Classes handling automatic resizing and moving of widgets, for composing complex dialogs. |
| Shared Classes | Classes that use reference counting for fast copying. |
| Input/Output and Networking | Classes providing file input and output along with directory and network handling. |
| Main Window and Related Classes | Everything you need for a typical modern main application window, including menus, toolbars, workspace, etc. |
| Miscellaneous Classes | Various other useful classes. |
| Model/View Classes | Classes that use the model/view design pattern. |
| Object Model | The Qt GUI toolkit's underlying object model. |
| Organizers | User interface organizers such as splitters, tab bars, button groups, etc. |
| Plugin Classes | Plugin related classes. |
| Standard Dialog Classes | Ready-made dialogs for file, font, color selection and more. |
| Generic Containers | Qt's template-based container classes. |
| Text Related Classes | Classes for text processing. (See also XML Classes.) |
| Threading Classes | Classes that provide threading support. |
| Widget Appearance and Style | Appearance customization with styles, fonts, colors etc. |
| XML Classes | Classes that support XML, via, for example DOM and SAX. |
| Qtopia Core Classes | Classes that are specific to Qtopia Core (Qt for embedded Linux). |