The list of widget libraries is exhausting mostly because it seems so retro.

If the desktop windowing world were this fragmented for GUIs, life would
have been harder.

And if developers had to worry about licensing issues to write GUIs, life
would have been harder.  Widget libraries needs to be standardized and
royalty free to win real mindshare.

Now we're back at that stage for Browser GUIs once again since plain HTML
markup is falling by the wayside....cycling through trying to figure out
what GUI libraries too choose, with no clear market leaders that are
destined to be the winners.

So whatever you choose, it won't matter for long as the likelihood your
choice will be that winner is low.

With those grumbles in place, QxWT, like SmartGWT, is nice in that it at
least fits in the GWT world, but sadly they are not based on GWT's widgets
and panels and so development is impeded if you want to be firmly in the
Java/GWT camp and don't want to deal with changes, enhancements, etc. in
Javascript should you want different behaviors.

So what is "best widget library" that is purely in the GWT world?  That is
tricky indeed as I've found working through it all.  It's quite a task just
to analyze them all and determine which are pure GWT and which are GWT
wrappers around JS libraries or perhaps use entirely different schemes like
Vaadin that I'm not sure what exactly they do yet.

We still have not heard back from Ext GWT on their commercial licensing
terms, with the last word being that Ext reserves the right to define what a
"developer" means, though we've never heard of a license that does not
define such a basic term considering they license on a "per developer"
basis.  It is unnerving that they cannot just be clear, suggesting that
perhaps they'll just change their license terms in the future in unexpected
ways that could mean you are stuck using an old version of their library or
deal with the new terms whatever they may morph into.
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