WP Comsoon (from “Coming Soon”) creates a little widget for the sidebar to display the titles of the next scheduled posts of the blog.
Rico Bookmark Tree
This plugin can create a simple bookmark list with a tree structure on a post using Rico Ajax
Simple Author Box
Adds a simple author box with Gravatar image below
More at: http://weblogtoolscollection.com/archives/2010/04/11/wordpress-plugin-releases-for-0411-3/