[CentOS] Cross-platform GUI libraries with drag 'n drop IDEs

Frank Cox wrote:
> 
>> OS: CentOS 5.0 x86.
>>
>> I am a programmer, relatively new to GNU/Linux and am looking for cross 
>> platform GUI development, mainly for EL5 and Windows. I have found 
>> wxWidgets so far. I prefer drag 'n drop programming IDEs, QT seems to 
>> provide this for GNU/Linux, but it isn't free for Windows.
>>
>> Does anyone know of any decent free GUI cross-platform library for EL5 and 
>> Windows with a drag 'n drop IDE?
> 
> Realbasic?


Actually for C++.