Help finding a sidebar type widget?

Hello all, I’ve been working on my first blog layout and such for about two weeks or so and I’m doing some final touchups, but as I’m doing it I’m looking for some extra things I can implement into my blog such as widgets.

I’m currently running wordpress on a localhost before I launch it online so I can see everything including plugins.

But basically, for an example of what I want is this widget (I would assume). It has tabs that you click on a little icon and it scrolls between Recent Comments, Popular Posts, and Archives. It scrolls them all in this little box pretty much.
an example is on the right side of the page of: http://www.multiplaying.net/

I looked through pages of plugins and a few forums but couldn’t really find exactly what I was looking for. If anybody could help it would be much appreciated.