Fonts adds more fonts and font size control to the Visual editor tab.
WP Social Share helps you and your users to share blog posts directly from your blog.
Bad Behavior complements other link spam solutions by acting as a gatekeeper, preventing spammers from ever delivering their junk, and in many cases, from ever reading your site in the first place.
Facebook makes your site deeply social by integrating functionality from Facebook.
HyperDB is an advanced database class that supports replication, failover, load balancing, and partitioning.