Hi,
The ports include MSW, GTK {2, 3, 4, etc}, OSX/Cocoa and Qt.
There is a very very basic DFB port of wxWidgets.
There was a wxMotiff port, but it is no longer there as it went unmaintained for so many years. The drop was done in the current latest release.
There is X11 port. It is feature rich, but unmaintained for many years. The only reason it is kept is because it used as wxUniversal on *nix-like port.
And of course there is a wxUniversal. This port is basically used to create a brand new ports. It is actually a set of widgets that are being painted by wxWidgets itself.
There is also a Haiku port based on the Haiku API. But this one is not maintained by wx core team.
There was also OSXD/Carbon port of wxWidgets, but it was abandoned, because Apple stopped supporting Carbon with I think 10.8, and when the minimum required OSX raised, Carbon had to go. Also Carbon application is 32-bit only.
However some pieces of API from Carbon still referenced in the current Git master. So don't be surprised.
To get a full list - "Use the Source".
To find out if it is getting the maintenance - ask here or on the wx-users ML.
Now to answer your other questions.
I believe the Qt license prohibit to link statically, unless you pay Nokia for the license. Please consult the lawyer if you know one.
Keep in mind so that the relaxing license is available only from Qt version 5, so if you have version 4, you are out of luck.
wxQt port is not really basic, but it has quite a lot of issues, because people don't really care about this port. But occasionally it does receive patches.
Also notice that Qt itself is huge and is split between multiple so/dll/dylib files. So, if you really plan to link statically you binary will be huge and will kill the download of any decent provider.
(A note worse mentioning: wxQt port was originally made to make software work on Android. But since Android idea was abandoned, wxQt stopped being actively maintained)/.
I strongly suggest to consulta lawyer before even thinking of using Qt/wxQt statically. I belive you will have to pay for the licejnse to Nokia in order to do that. And the license cost approx $1500. But because Qt has double license you can link dynamically for free.
Thats actually a reason why originally wx team were using GTK port and not Qt one.
Also as I said - wxX11 port is feature rich but unmaintained. So if something will not work - you are on your own fixing it. So I doubt it will "just work" on X11.