Twitter users check out: friendorfollow.com. Enter your Twitter name and this fab little site will break down your friends and followers into three categories:

• Following – those who you are following that are not following you back (to my surprise this showed me that neither Barack Obama nor Gordon Ramsey are interested in my Tweets!)
• Fans – those who are following you but you are not following them
• Friends – those who are following you and vice versa

Great if you are in the mood for a little Twitter housekeeping.