Is there any app that sorts your followers by time/date of last tweet? Would be a good way to weed out those that don’t participate

There seem to be quite a lot of people looking for a way to manage their followers / friends on Twitter. These two requests show one way of doing it – by culling those that aren’t participating.

Is there an app that easily allows you to unfollow inactive tweeps?

Taken from the TwitEye idea stream.