Recently I wanted to teach my kid Smalltalk and I deep-dived into the current Smalltalk landscape... I wanted to show him how to create desktop apps using a "UI Designer" tool (like it was possible with WindowBuilder in Visual Smalltalk in the 1990s). Impossible to get a copy of Visual Smalltalk these days... Pharo doesn't have a UI designer... VA Smalltalk by Instantiations isn't free anymore... VisualWorks is not free...
https://github.com/dolphinsmalltalk/Dolphin Dolphin had a 'view composer' but obviously it's a bit pining for the fjords.