On Win32, wxruby works well. The widgets are native, and the API is 
pretty stable at this point. The wxruby team is working on using wxMac 
2.5 on OS X to improve it's Mac functionality.

Nick

Lothar Scholz wrote:
> Hello Gandhi,
> 
> 
> G> Yes, I belive Qt (and GTK) are pretty advanced stuff in Unix world.
> G> However seeing that users of my app will be mostly windows folk I'm
> G> looking for something closer to windows look and feel. 
> G> So between FLTK, FOX, wx (are there any other options?) which one would
> G> you recommend?
> 
> If i had to start again i would use WX for my low-cost projects.
> For a commerical application i would now always choose QT, it's also
> very good on Windows.
> 
> All toolkits are bad on MacOSX. There you can't only use ruby-cocoa.
> 
>