Please stick to 1 thread regarding this topic. There are already some threads about this (which you also
participated in and which have merged together already because they are about the same thing
(ref. threads: "[Preview] Window Designer", "Window Designer Update" and "(For Dempsey) Window Builder"))...
The official
Interface Window Tester is developped by Patchou.
The works-in-progress from 3rd parties can be found in these threads:
[alpha] Interface Designer
[Preview] Window Designer
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