I have been contacted by a few people about Qt/IUP. Here's my current state of mind...
It works mostly.
It lacks a few widgets
It needs someone to walk over the docs checking everything is implemented and semantically right.
It has a (IMVHO) decent structure for the Qt backend. It should be possible to implement everything using it.
The IUP people know about it.
It's still just my toy, AFAIK
So, its future seems to rely on me having time and energy to finish it... and there's the catch.
I am Gimli. I am not a marathon runner. We dwarves are natural sprinters! So, I can usually cook up a decent project in a week or a month, and then it languishes.
Specially because I really don't need Qt/IUP.
I only got here because I was trying to learn D and I didn't like any of their portable toolkits, and I found no better small C toolkit I could wrap, and then I disliked it being Motif.
As you can see, an entirely too weak link from me to Qt/IUP to be sustainable.
I will try to push it today, implementing the missing widgets, and see what happens.