All new posts in sidebar

Hi guys!

I can't seem to find such an add on. Basically, what I need is an add on that shows all the newest posts in the sidebar. I know that there are add on's like that already but they only show one post per thread.

What I need is, for an example, if there are 10 new posts in one single thread that every single post is shown, not just the newest one in that thread.