EmmsUI is a plugin for drawing immediate mode UI in Unreal, built for the UnrealEngine-Angelscript fork. It works by maintaining a tree of UMG widgets that is controlled through angelscript code.
[WIP] This is a work-in-progress project. It works for basic use cases but hasn't been thoroughly tested. Things might break, APIs might change, and there are probably bugs. Tested primarily on macOS ...