Twitoria is much like MyCleener that we just listed yesterday. You simply enter your Twitter username and set a filter level of friends last tweets. You can list those that have not tweeted anywhere from a week to a year.
Twitoria tries to reduce Twitter’s clutter by revealing friends you are following that haven’t posted an update in a while
That is all folks, move along and get rid of those flailing accounts. If they come back, re add them