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.
ManageTwitter lets you sort your Twitter contacts based on who's inactive, who tweets more than five times a day and who tweet less than once a day. You can further subdivide these lists based on the date you began following someone, their username, number of followers or their time zone. ManageTwitter also features a mass select and deselect action for unfollowing users.