Link Dump

I don’t know if this issue has already been adressed, but i couldn’t find it…
I am looking for a way to allow viewers (any!) to add links to a page.
These links have to be up there right away, as well as their names and a title for the link. Also it would be nice if their ip’s were logged somewhere to prevent spammers…

Can anyone tell me how-to, or direct me to an existing plugin?

Thanks in advance,
Yogie