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.
KConfig provides an advanced configuration system. It is made of two parts: KConfigCore and KConfigGui.
KConfigCore provides access to the configuration files themselves. It features:
KConfigGui provides a way to hook widgets to the configuration so that they are automatically initialized from the configuration and automatically propagate their changes to their respective configuration files.