What type of tools you want ??? You can get Dynamic Twitter Signature at : http://www.startwitter.info Coming soon at Startwitter.info : Auto Twitter Posting, Button Generator and Twitter Bacckground Changer.
Yeah john chow made this site here http://twitterfollower.com I usually get 80-150 new followers a day with it
I would stay away from these "twitterfollowers" sites, they are generally a scam and will post tweets from your account without you knowing about it. Here is a good starter list of twitter tools that I've messed around with.
Hundreds! Try starting with HootSuite. Twitter Karma then maybe Tweetcloud & Nest.Unclutterer HootSuite is the professional Twitter client. With HootSuite, you can manage multiple Twitter profiles, pre-schedule tweets, and measure your success. Karma - see who’s not following you in return, who you have a mutual follow/follow-back relationship with, and who is following you that you’re not following back. Tweetcloud - Tweetcloud creates a tag cloud of a person’s tweets to give you a bird’s eye view of the type of things they tweet about. Nest.Unclutterer will automatically block Twitter users who are following more than a certain number of people or who have been inactive for a certain number of days. Read more : http://mashable.com/2009/06/09/organize-twitter/
You can use AutoTweeter , which can send automated tweet messages and DM's . it is a desktop application.
Thanks to all responders, I don't want to use any auto twitter, but I want to sort out the people whom I am following but they are not following me and vice versa.
go to www.huitter.com - u can mass follow all who are following you and you can unfollow all who dont follow you back - all in 5 minutes!
I just found this on Google by doing a search for "free twitter friend adder" freetwitteradder.com I don't know if it works or not though but I would check it out if I was you.
Depending on what you're looking for, there are a lot of great tools out there. The best one, in my opinion is TweetLater. There are a lot of great tools on that site. Also localtweeps is great for finding followers near you.