Has been using Qt Framework for quite a while. It is very complete, good and intuitive framework. Thanks to Nokia and now you can use it under LGPL license.

If you are fancy to have skin for your application or some animation, you have to try QT Framework and the best thing of all is the cross platform capability. You code once and it is run under Windows, Mac, Linux, Windows Mobile, Symbian and some embedded OS.

The learning curve for this framework is quite short. If you are experience with C or C++, it will just take a few weeks to get used to the framework.

I will try to post some hints based on my experience.