[C++ cross-platform frameworks] - what to use?

Hello.
I'd like to hear your opinions about various cross-platform (GUI) frameworks. Which one is better in terms of design, easy usage, size of executable, bugfreenes etc.
Currently, I tried wxWidgets, everything is fine, however it generates very huge executable (~4Mb) for a simple application. I also know about QT but seems like it's not free (the one which available for windows development), anyway would appreciate any useful suggestion.
Regards, David.

The cost of QT is considerable.

I use wxWidgets, and the static builds are large but it works reasonably well.

These are really 'the' two, as far as I know.

I would also consider wxWidgets for cross platform C++ development.

Personal experience, I do recommend WxWidgets too. The sizes for binary executables may be cut down if you take care not to compile against "monolithic + unicode" builds, which is the largest burden I know of.

The only downside I consider there are no easy to use GUI designer for WxWidgets, WxSmith (included with Code::Blocks IDE) and WxFormBuilder pretty much do half the job, but they are not even close to the easiness of design you have with, eg.. any Visual Basic.