Social allows you to broadcast posts to Twitter and/or Facebook, pull in items from each as comments, and allow commenters to use their Twitter/Facebook identities.
Social Graph Protocol is a quick and easy way for you to integrate all of your websites content into the open graph developed by Facebook.
Adsense Float shows Google AdSense ads at a prominent position on your site, which maximizes the CTR and revenue of your site.
Ban Hammer prevents people from registering with any email that is listed under your comment moderation blacklist.
Easy Modal allows you to easily add a Modal window with just about any content.