It creates grouping-like workflow using regular instances.

Ctrl+G – make Instance (group) from selected objects

F9 (adjust last operation) to set center of the group and set a name

Tab – Opens group edit mode

Deselect everything and press Tab – Return to scene.

Ctrl+Alt+G – ungroup

Ctrl+Shift+G – advanced options like make single user, and change instance.

This add-on uses regular Blender instances, so you can work with “groups” made by this add-on, even if you haven’t this add-on. 

Version 0.2:

– Ungrouping (Ctrl+Alt+G)

– Group menu (Ctrl+Shift+G)

– Make single user

– Make existing instances editable in Library

Version 0.3:

– Edit keymap in add-on preferences

– Add / remove from instance

Check also my other products:

Folds Modifier

Voxel tools and Tile map

Synchronize Workspaces

Building Generator

Quick Groups