Best free Wordpress autoblog plugin?

Can anybody share a FREE Wordpress autoblog plugin?

Thanks.

I don't trust a free content plugin anymore. When you take in consideration of the amount of changes search engines make a week, you never want to get hit and your sites dropping. When you have 20+ sites running on auto pilot, changing the plugins is a HUGE pain in the arse. I quit and bought a plugin that is updated all the time, so now the updating takes so less of my time and when Panda strikes, it hits me less than others.