AutotweeterPro is best alternative to TweetAdder autotweeting software on the internet. TweetAdder has been blocked by Twitter ! . 
This autotweeting software will never get blocked by twitter because AutotweeterPro uses different (non-spammy) tweeting mechanism.

UPDATE 15th August 2016 : 

Twitter now wants phone number verified. Please verify your phone number with twitter before setting up AutotweeterPro with your twitter account. You can also use a free google voice phone number , if you do not want to provide your personal phone number to twitter.

A brief video of AutotweeterPro in action. 

Our happy customers , powered by AutoTweeter.