Find out when you were unfollowed and why: This is an excellent tool both for business and personal use on Twitter: Tweeteffect. By searching for any Twitter username, you can see a summary of how many follows/unfollows that account gained over the past 30 days. Where it gets really clever though, is when you scroll down you can see a full summary of your tweets and which ones caused you to gain or lose followers, and how many. Measure your Twitter campaigns: Optify is a social media monitoring tool that contains a free product for Twitter, allowing you to measure the success of your Twitter account. While it offers much of the same tools available within CoTweet for managing your Twitter account, Optify does offer a lot more in the way of Twitter analytics, which is key for any business active on Twitter. Get the full story at The Next Web