I use a site call Buzzom that has a flush tool called Twitin which allows you to unfollow anyone who is not following you back. Its a great feature I use every week or 2 so that you can get rid of people who aren't following you. Now you can free up users to hopefully go out and find new people who will follow you. http://www.buzzom.com/TwitIn.aspx
Unfortunately, twitter has blocked the free programs but there are some good paid ones out there. I prefer automating it instead of doing it manually but to each is own.
recently we have same problem found a great tool that helps and recommended by us to every single twitter user. those are want to unfollow their non following users so here is the Link .how to unfollow those who are not following you
You'll get suspended by twitter for doing bulk unfollow. There has already been a statement on CNN that Twitter will be requesting all automated twitter tools to be disbled by Jan 1st or their will be an investigation and brought suit to the warning
A 116 old days old thread resurrected! Oh well, today you can mass unfollow people without being suspended, it's all about the service you use for that. Those abiding by Twitter guidelines are up and running but you have to manully select the people you want to unfollow. www.Untweeps.com is one of those services allowing mass unfollow as long as you thick manually who of the listed people want to unfollow. The drawback is that they only alllow you one free session per month, otherwise you have to pay. Great free services to handle your unfollow tasks are www.FriendorFollow.com, www.Justunfollow.com, www.manageflitter.com and www.twerpscan.com
There are no tools now to mass unfollow now as Twitter put its foot down. But there is a workaround: How To Unfollow On Twitter In Minutes I just unfollowed 10,000 people in about 30 minutes. And it didn't cost a dime.
I love twitter karma and wouldn't know what to do without it. It shows who you follow and who follows you in a convenient format.