I would opt for the wxwindows port - it includes suppport for all the
mentioned platforms - including OS/2. (this is btw used/supported by
Schitech for their Display Doctor 7.0)
I also believe that wxwindows should compile for cygwin - it would be a
nice inclusion if anybody had the time and skills to maintain that ( I wish
I had - but I lack both skills and time.. )
BTW - I definitely understand the wish for a cross platform solution - when
you create such an application it really is much easier to maintain if you
only have one piece of sourcecode...
Franz,