I have recently been working on an addon that lets you control node groups from the 3D viewport, the result of which is NGviewer. It lets you edit node groups of selected objects without having to go into the shader editor:
this addon is still currently in beta, so I will be changing things and updating it frequently.
in terms of content, this addon is basically all UI so that’s where I will be focusing my attention.
You can buy the addon here:
Or if you want to try it first, you can get a trial version here:
This version is fully featured but has a link to the store page at the top of the panel for if you decide to buy it, which would help me continue updating this addon
And if you have any questions, feel free to ask me!