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.
Qt bindings for the Telepathy communications framework
Telepathy-Qt is a Qt high-level binding for Telepathy, a D-Bus framework for unifying real time communication, including instant messaging, voice calls and video calls. It abstracts differences between protocols to provide a unified interface for applications.