borisz,

• ...hardest part is to explain why someone should use this module in favor of List::Util
This is a good point in general. Perhaps the README should include a FAQ for questions like, why isn't there an X function. The reply would be because it is part of module Y.
• I personally dislike uppercase functionnames a lot!
I have a tendency to name my subs like Add_Name and am not sure why I did all uppercase.
• And there is already List::MoreUtils, perhaps your functions fit more in this module.

From my original post:

I want to stress that this post is about the idea in general and not this specific proof of concept.

The reason the proposed name was Tool::Box and not Functions::List::Util::Forgot was because I see it as being a hodge podge of functions (such as getting the intersection of two arrays). These functions were only examples of what I was thinking about and not specific functions that I think should be included (concepts not specifics).