Spice up your comments area with goodies like commenters twitter or last posted article link and nofollows by rules.
Enhanced Comment Area
Imports comments made on facebook postings (like through RSS Graffiti) back into the blog. Also embeds Facebook OpenGraph Meta-Tags into the blog. Note that adding "like"-Buttons to blog entries is achieved via the serendipity_event_findmore plugin!
Frontend entry filtering
Allows visitors to filter/order your entries by several options
Adds a twitter/identica client to the admininistration interface, searches for tweetbacks and announces new articles to a microblogging account.
Group a category's entries in a frontpage box instead of the usual article listing. Supports nested newsboxes.
Properties/Templates of categories
This plugin provides additional properties for categories and their entries, including custom templates, sort order, display limit, password protection, and RSS hiding.