In the now
three years two years since Nokia [announced the] purchase of Qt I have been impressed to the extent that Nokia is taking advantage of their new Qt technology. It's basically turning into their development development SDK for all their smart phones. This is more or less what the press releases said at the time. But I'm sure eBay sent out a bunch of nice press releases about how helpful their 3 billion dollar Skype purchase was going to be for them... and look what that got them. However in the case of Qt those press releases (as I remember them) turned out to more or less be spot on.
As anyone with a N810 can tell you, you can't just stick a desktop UI on to a small device. It needs to be thumb-friendly.
One solution is QML. It's a declarative language, which opens up some interesting possibilities. However it currently isn't a toolkit, but only has primitive shapes. It's not really clear what the longterm plans for QML are. With its tight integration with QtScript its already pretty ideal for making simple applications or for something like a plasmoid. So it's not one of the "two Qt UI toolkits", as currently its use-cases are quite different.
At the Maemo conference in October, Nokia released the Maemo 6 UI Framework to Gitorious. This is a full-on QGV-based UI toolkit, with buttons, dialogs, lists, etc, everything you'd expect in a UI toolkit.
And now this month the "Orbit Team" has released a new QGV based UI toolkit on Gitorious called UI Extensions for Mobile. It's also a full-on UI toolkit with all the widgets you'd expect. It's target is Symbian^4 according to the Gitorious description. Someone already wrote a little demo since the included code doesn't really have anything to show it.
It's kind of funny to see both of these competing technologies listed one after the other on http://qt.gitorious.org/. Such interesting times we live in. :)