Manually sifting through your followers to identify these users could take hours. That's why several sites have sprung up to help you take back control of your Twitter account. These sites scan your followers and generate a list identifying which ones haven't tweeted in a while so that you to remove them accordingly. Check out the top five picks for free sites that help you efficiently restore order to your account.
Twerp Scan helps you manage your followers and the contacts you're following. Allow the site access to your Twitter account and it will generate a report detailing for each contact how many followers they have, how many people they're following, their follower-to-following ratio, their number of tweets and the date of their last tweet. You can sort your contacts based on any of these characteristics, and by clicking a box, you can either mass follow, delete or block them.