Do you know about Linked Duplicates ?

It's great ! It duplicates your object but keeps the data linked. By doing so, you save memory and all the edits that you do to one of the linked duplicates also impacts the other duplicates. 

I use this feature all the time! Yet sometimes, I get to a point where I would like to un-link some (or all) of my linked duplicates. It's fine when there are only a couple of objects.
But it becomes problematic when there are a few hundreds or thousands of them because you have to select each object and one by one make them single-users...

Fortunately, if you are blocked by the above situation, this addon will save you!

1 Click Single Users lets you select all the objects that you want to unlink and with a click, it un-links them all.