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 interface for 3D visualization library Coin
By using the combination of Coin, Qt and SoQt for your 3D applications, you have a framework for writing completely portable software across the whole range of UNIX, Linux, Microsoft Windows and Mac OS X operating systems. Coin, Qt and SoQt makes this possible from a 100% common codebase, which means there is a minimum of hassle for developers when working on multiplatform software, with the resulting large gains in productivity.