These pages document Qt's API's for some widely-used standards and technologies.
| ActiveX in Qt | Qt API's for using ActiveX controls, servers, and COM. | 
| Container Classes | Qt's template-based container classes. | 
| D-Bus | An introduction to Inter-Process Communication and Remote Procedure Calling with D-Bus. | 
| Gestures Programming | An overview of Qt support for Gesture programming. | 
| Inter-Process Communication in Qt | Inter-Process communication in Qt applications. | 
| Multimedia Overview | A set of APIs for working with audio, video, radio and camera devices. | 
| OpenVG Rendering in Qt | Efficient rendering on embedded devices with OpenVG | 
| Phonon multimedia framework | Using the Phonon multimedia framework in Qt. | 
| Qt Bluetooth Module | The Qt Bluetooth API enables connectivity with other Bluetooth enabled devices. | 
| Qt Location Module | The Qt Location API provides positioning, mapping, navigation, and place search via QML and C++ interfaces. | 
| Qt Publish Subscribe Module | A set of APIs to publish and read values. | 
| Qt Sensors | The Qt Sensors API provides access to sensors via QML and C++ interfaces. | 
| Qt Service Framework | A set of Qt APIs to that allows clients to discover and instantiate arbitrary services. | 
| Qt System Info Module | A set of APIs to discover system related information and capabilities. | 
| Qt XML Patterns Module | The Qt XML Patterns module provides support for XPath, XQuery, XSLT and XML Schema validation. | 
| Qt3D Module | The Qt 3D module provides a set of APIs to make 3D graphics programming easy and declarative. | 
| QtOpenGL Module | The QtOpenGL module offers classes that make it easy to use OpenGL in Qt applications. | 
| QtSvg Module | The QtSvg module provides classes for displaying and creating SVG files. | 
| QtXml Module | The QtXml module provides a stream reader and writer for XML documents, and C++ implementations of SAX and DOM. | 
| SQL in Qt | Qt API's for using SQL. | 
| Unicode in Qt | Information about support for Unicode in Qt. | 
| XML Processing | An Overview of the XML processing facilities in Qt. |