Wp tweet machine is a plug in that i personally used and if you want to get huge traffic from twitter and build a good following then this is the best tool for you guys. It is very simple to use. Just install it on your wordpress website make a few settings and thats it. You will start getting followers in minutes. You can automate posting, you can also make this software pick famous tweets from twitter and retweet them. Check it out here on this link i am sure you will love it. Wp tweet machine.