you might think of Colugo who drilled up Godot-Game Engine for his UI. Ever since writing a plugin based environment that steps out of classic DAW thinking and also steps out of Godot-scripting. One has to know that Godot has a nice Audio-Bus system implemented but no nice midi that fits the needs nor realtime demand of a daw today. So he basically developed everything from scratch. It’s nice to watch him overcome the same challenges independent development brings but also offers. Here you go…
At least its the first i could recommend might fit your description. There are many more projects.