• iFollowBack - Fast Twitter Networking: It is a way to identify, get followed and follow back your friends on Twitter. You sign up and agree to follow back other users. Other users sign up, and agree to follow you.
  • TweepleRank - Ranks the top recommended people on twitter. It does so by monitoring the tags #followfriday, #mrtweet and #tweepletuesday. The site also allows you to search, filter by tag, or even personalize the results to find new and interesting people to follow.
  • Twidiots - Find out people, who have left twitter, who do mass-flollow, who has a lot of friends(and probably dont read anybody’s updates), who follow some persons, unpleasant for you or those, who simple don’t follow you back. All this in 2 clicks. Make your friend list and timeline cleanr!
  • Twibes - Hand picked friend recommendations
  • FlashTweet - A mass follow tool that simplifies the process of adding your twitter friends. You can see who you are following that is following you back, follow friends from other users and even unfollow multiple friends at once.
  • GeoFollow - Geo (location based) twitter user directory. (Add youself on twitter by sending @geofollow YOUR CITY, YOUR STATE YOUR ZIP #tag1 #tag2 #tag3. EG: @geofollow Walnut Creek, CA 94596 #directory #geek #people
  • tweetListings - Real-time Twitter job listings.
  • Tweeter Tags - Get the most out of Twitter by finding the right people to share the conversation: Tweeter Tags makes it easy to declare your interests and find new, like-minded friends. Have a question you need answering? Find relevant people on Twitter to ask.
  • Twitter2FF - Sync your Twitter and FriendFeed contacts! From @twit2apps!
  • TweetLater.com - Auto-follow new followers and send auto-welcome messages.
  • Mr. Tweet - By looking through your network and tweets, Mr. Tweet will regularly suggest good people you are missing out on, recommend you to enthusiastic users relevant to you, and regularly update useful stats of your Twitter usage
  • New Follow Notify - Get to know your new followers better
  • DoesFollow - doesfollow.com will quickly tell you if one person follows another on Twitter. saves you from paging for the answer.
  • Friend Or Follow - Friend Or Follow helps you manage your Twitter contacts. Submit your Twitter screen name to find out who you’re following that’s not following you back, and who’s following you that you’re not following back.
  • Twitoria - How many twitter friends are you really following? Twitoria reveals friends that haven’t tweeted in a while without having to enter login information.
  • Qwitter - catch twitter quitters
  • Twalala - twalala gives you the ability to mute the people you follow and mute tweets that contain specific keywords.
  • MyCleenr - MyCleenr is a unique way to sort your friends by their last tweets. It allows you to get rid of all the inactive and useless accounts that you are following!
  • Twitter Karma - Pulls your Twitter contact information and presents a simple interface for following, unfollowing or blocking people, with several useful sorting options.
  • Twitterless - Twitterless will notify you when somebody stops following you and tell you who it is and your follower history is graphed out over time.
  • Twitblocker - temporarily hide excessively chattery friends without having to surrender your password to a 3rd party, with this greasemonkey script.
  • Retweetrank - Ranks each user depending on number of times they have bAppseen retweeted. Also, presents a list of top 50 twitter users who have been most retweeted recently.
  • UnTweeps - Lists Tweeps you are following who have not updated in 30, 60, or 90 days. Unfollow them with one click. Now using Oauth! Keeps your password secure.
  • Tweet-Rank - Check the quality of your Tweets. Just enter username and tweet-rank will show you with which tweet you won or lost followers.
  • TweepDiff - Compares the friends or followers of any two Twitter users to see where they differ and overlap.
  • Follow Cost - Provides stats on how frequently a Twitterer makes updates. Includes stats on @ frequency and political tweet frequency.
  • WhoFollowsWhom - helps quickly find common followers of several Twitter users as well as who they are following in common.
  • FavTwits - See who you talk to most, and who talks to you, using @username.
  • twitTangle - untangle the mess of having too many friends on twitter. We allow you to rate and tag your friends and then filter your timeline to help you easily find the tweets that are most important to you!
  • TwtrFrnd - Find out who two Twitterers follow in common, plus who Twitterer 1 is following that also follows Twitterer 2.
  • TweetSum - Follow or ignore your recent followers with a simple drag and drop interface.
  • Topify: Smarter Twitter email follower notifications. Know exactly who is the personn following you. 1 click follow back, by just replying to the email. Answer to Direct messages directly from your inbox
  • Mutuality: Tool for mass unfollow unmutual followings.