Socialtoo.com is web tool for twitter allows you to auto follow that follows you and auto unfollow those who unfollowed you. They offer a robust set of online survey tools, where you can create and send polls to Twitter and other social networks. 
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Category: Web Apps for Twitter: Tweet Tools

Twitter Magazine brings U tips & tricks, polls and the sweetest people in Twitter City. In 140 characters or less. Or more...;) 
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Category: Resources Twitter