For those who want to follow people back who are following you or unfollow people who doesn’t want to follow or stopped following you, you might want to check out these free awesome tools.

• Socialoomph – Let’s you auto-follow people depending on your specified keywords and allows you to schedule twitter updates as well.

• friendorfollow – Just type your username and you’ll know who are the users whom you’re following and not following you back, whom you follow and follows you back, and those who follows you that you’re not following back.

• SocialToo – With SocialToo, you can; Auto-follow people who follows you within 24 hours. Unfollow people who stopped following you and you can also set your account to automatically unfollow accounts whose activities appear to be spam-like. Block DMs from other services.

• UnTweeps – Allows you to unfollow selected people you are following who don’t tweet often.

• FlashTweet –  You can add multiple Twitter accounts to your profile, discover who you are following that is following you back, mass follow users based on search terms and location, unfollow multiple friends at once, schedule tweets in advance to run throughout the week, insert RSS feeds that will automatically tweet the title and link of your blog or another site.

• TwitBlock – helps you in blocking automated or computer aided Twitter accounts that might take you to adult sites full of spammers and phishing attacks. It is a simple yet powerful junk filter and bulk blocking tool for Twitter users.

• Tweet Blocker – helps you identify and unfollow twitter spammers. Tweetblocker also maintain list and rank the top spammers on Twitter, allowing users to quickly and easily find spammers.

• Refollow – Powerful twitter manager that lets you manage your friends and followers, explore Twitter Social Graph, batch Follow/Unfollow/Block twitter followers, discover relevant users, filter irrelevant Users, lock relationships and much more.

• Tweetspinner - A powerful twitter unfollow tool that provides you with a list of twitter users those who are not following you and allow you to unfollow 50 people at a time from the list. With Tweetspinner you can:
  • Automatically clean spam from your DM inbox
  • Schedule rotation of Twitter profiles & designs By alternating different images and bios
  • Highly configurable filters and analysis help you find quality twitter users to follow.

• Buzzom – With Buzzom you can:
  • Find and Follow interesting people.
  • Find people who are not following you back.
  • Follow back people who have followed you.
  • Find followers and followings of another Twitter user.

• If you don’t want to use any of the unfollow tools but you still want to know who stopped following you, follow @unfollowr on twitter and get a direct message whenever someone stopped following you.