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.
Unit testing for Qt
With CuteTest you can create unit tests and view their results. It is based on QTestLib but extends it with the following features: You can have multiple test suites (test classes) in a single project. Test suites are registered automatically. No need to manually build the list of test suites. CuteTest provides a public API to retrieve the results of a test run.