Displays a total count of all Facebook, Feedburner, and Twitter followers in text format.
Twitter Counter Cache-rizer show the number of followers a certain Twitter account has, even when Twitter is offline.
Tweet Lovers shows the Twitter profile pictures of the ones you are following or your followers in a widget.
Gain more followings on Twitter by creating your own follow train.
UPDATE: Now you can exclude blocked users from your followers list! Simple Twits allows you to display your Twitter posts and followers on your blog.