Sky Q, the home entertainment system of Sky plc.webOS, a multitask operating system from LG for smart devices like TVs and smartwatches.Lomiri, formerly known as Unity8, a phone UI developed by Ubports, originally by Canonical.LuneOS, community-driven successor for Palm/HP webOS.Plasma Mobile, a touch-based GUI developed by KDE.Sailfish OS, a mobile operating system developed by Jolla.Blackberry 10, a touchscreen-based mobile OS by Blackberry Ltd.Avionics, Panasonic's in-flight entertainment system.AsteroidOS, an open source operating system designed for smartwatches.(This is a display manager and not a desktop environment.)

SDDM, a display manager that is X11 and Wayland compatible written in QML.

Trinity DE, a continuously developed fork based on KDE3.

Unity 2D, a desktop shell written in Qt and Qml.

Maui Shell, a DE that also features their own app suite.

Lomiri (formerly Unity8), a convergent desktop environment started by Canonical, maintained by Ubports.

Lumina, a desktop environment designed for BSD-based TrueOS.

LXQt (Lightweight X11 Desktop Environment).

DDE ( Deepin Desktop Environment) of Linux Deepin.

KDE Plasma, a libre desktop environment for various computing devices.

Graphical user-interfaces and desktop environments that utilize Qt/QML as widget toolkit: Other features include SQL database access, XML parsing, JSON parsing, thread management and network support. With Qt Quick, rapid application development for mobile devices became possible, while logic can still be written with native code as well to achieve the best possible performance. Qt also provides Qt Quick, that includes a declarative scripting language called QML that allows using JavaScript to provide the logic. Qt supports various compilers, including the GCC C++ compiler, the Visual Studio suite, PHP via an extension for PHP5, and has extensive internationalization support. An example of such a non-GUI program using Qt is the Cutelyst web framework. Non-GUI programs can also be developed, such as command-line tools and consoles for servers.

Most GUI programs created with Qt have a native-looking interface, in which case Qt is classified as a widget toolkit. Qt is used for developing graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and most mobile or embedded platforms.

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