Favorite GUI library?

[TheGag96]

Heya guys. For my projects that use a GUI library, I've tried 
both tkd and DlangUI. Both I feel have their drawbacks, and I'd 
like to know if any of you are using anything you find better. In 
my case, my ideal choice would be:

- Nice bindings/API, friendly to idiomatic D
- Cross platform
- Can compile to a standalone binary (no shared libraries or 
extra files)
- Reasonably efficient
- Support for a good amount of well-working widgets

Although quite a cool library, my biggest issue with DlangUI was 
that it was a little mind-bending at times to keep track of 
multiple widgets that view/modify the same data without screwing 
things up. I saw QtE5 recently and have been thinking about 
trying it out.

What do you all recommend? Thanks!