Do you know of this command-line tool?

I have had the following request, which I don't know the answer to. So, can any of my faithful readers answer this? 

Do you know of any tools that let me push/pop the clipboard stack???? I can copy (ctrl-c) a bunch of things to a clipboard. Then using a mouse in Office I can paste any of those items. But from the command line I can only paste the last thing I copied. I want to be able to go back to the previous item on the stack. If that means I lose the previously top item, I am fine with that. Know of any magic tools????

Bribe: For the first person to point me to such a tool: I will create a blog entry that talks about you and points to your blog/site/whatever.