How to Unfollow those who don't follow me on twitter

I'm having quite a lot of friends on twitter who doesn't follow me....so i just want to clear all the mess of them....

How to automatically do it....are ther some automatic unfollow tools??

 

use http://dossy.org/twitter/karma/

 

I have posted a tool that will unfollow those who are not following you on twitter.
Check this one:
http://forums.digitalpoint.com/showthread.php?t=1333984

 

use twitter karma.

it's kinda slow but works

also if you have purchased hummingbird it has an unfollow feature.

 

Just be careful not to follow or unfollow too many people at a time or Twitter can suspend the account. I like to use Hummingbird myself

 

be careful, if you unfollow many people at once your account will get flagged and your tweets will not be seen in twitter search.
it happened to me and now i don't know how to correct it.
anyone?

 

Thanks you all guys i really want to know this