[vtkusers] provide a user interface

[mauro maiorca]

Hi people,
I want to provide a user interface to my itk/vtk implementation.
A visual tool would be great, but it seems to me that the state of art
is far away to a broadly appreciated/used grafical user interface
engine (even not visual). At least this is my impression, and I hope
I'm wrong!
So, please, if you have any idea of a good documented c++ based,
linux-friendly, robust visual user interface engine that easily works
fine with vtk/itk, just point it to me!

cheers,
Mauro