Collection Manager
Manage collections and their objects.
Reviews with five stars
Love it and when it comes to managing collections, I cannot imagine working without it. Also like Jaye.Antoni_Whyldz, I'm kinda stuck as is broken in 4.4. Created a bug report: https://projects.blender.org/extensions/object_collection_manager/issues/2
staple addon for my workflow, however as of 4.4 it is completely broken and rendered unusable is there going to be any fixing of it in time for release?
Though at first it may look busy and crowded compared to vanilla Blender's Move/Link to Collection menus, the GUI exposes much more things you can do with collections, and therefore I think does a better job not only to teach users what collections are and can do, but also makes power users' life easier because all you need is there in a single convenient place.