Page and Post Clone
Suppose you wanted to clone a page, or a post. You could always install this module.
And sure enough, you would find that you could now click a single "Clone" button to duplicate your page, or your post.
But alas, suppose you created something like a video slider, using the Soliloquy module. And you wanted to clone your slider. Would it work with the above module? Nope!
You would then go hunting until you eventually found this module.
Now that module will allow you not only to clone your page or your post, but your Soliloquy sliders, too.