Add the new comment subscription option to the blog comment form.
Display Goodreads.com reviews for ISBNs or IDs you specify on any page or post.
Social Crowd retrieves the count/number of Friends/Followers from your favorite social networks and displays them throughout your blog
Displays your upcoming posts in a sidebar widget to tease your readers
Social Subscribers Counter is a plugin which display your twitter followers, facebook fans, and feedburner subscribers with a widget and also in the &
Today In History provides a simple widget that displays notable events that have occurred previously on this day in history.
The HeadCounters WordPress plugin adds a widget that displays how many visitors are on your site at that moment. Now Configurable!
The Readers Ranking WordPress Plugin. WordPress读者墙插件
This plugin identifies and tracks MyBlogLog readers on your website. You can also show a personalized message to these users.
BlogBuzzTime displays current readers on your blog, in real time, to other readers. Affiche les articles en cours de lecture sur votre blog, en temps
Allows bloggers to be more transparent to their readers by allowing them to notify readers the updations made in their blogs.
This plugin lets you ask your commenters extra questions, for them to select from a drop down box, when they leave you comments.
Comment for humans is the next step in the no-follow family. The intention is to remove any search engine benefit from leaving a comment.