More Twitter Marketing Software from Tweet Whistle is for serious Twitter marketers.

However, the fee is a one time fee of $39.95 and while that is not free, al least you don’t have to pay a recurring monthly. It is a one time cost.

This twitter adder program searches for potential followers by tweeted keywords, keywords in the user Bio, location, and followers of friends.

Auto follow features include auto follow, auto follower, auto unfollow and follower safelists. Auto messaging features include auto DM, auto tweet and RSS feed tweets.

The software also enables random time delay tweeting. You can also use it with an unlimited number of profiles.

With the demo version of tweet whistle you are limited to following 200 people, unfollowing 100 people, 10 tweets and sending 10 direct messages. This gives you an opportunity to try out the software to determine if you want to buy the real version.