Inqlude provides a comprehensive listing of all existing libraries for developers of applications using the Qt toolkit. Inqlude is run by the community and open for contributions.
Addons to QtWidgets
This repository contains add-on widgets and classes for applications that use the Qt Widgets module. If you are porting applications from KDE Platform 4 “kdeui” library, you will find many of its classes here.
Provided are action classes that can be added to toolbars or menus, a wide range of widgets for selecting characters, fonts, colors, actions, dates and times, or MIME types, as well as platform-aware dialogs for configuration pages, message boxes, and password requests.