Ettrich chose to use the Qt toolkit for the KDE project.

The handset user experience is driven by Nokia and uses the Qt user interface toolkit.

QComicBook is a comic book viewer that uses the Qt toolkit.

The GUI of the application uses the Qt toolkit.

Double Pendulum Simulator - An open source simulator written in C++ using the Qt toolkit.

The stand-alone program, which uses OpenGL and the Qt widget toolkit, can render images based on .3ds files.

It is written in C++ using the Qt toolkit.

NoteEdit is written in C++, uses the Qt toolkit, and is integrated with KDE.

Starting with the version 4 beta Google Earth functions under Linux, as a native port using the Qt toolkit.

Marabunta uses the Qt graphical widget toolkit, allowing it to be used on both Linux and Microsoft Windows.