Flash Video Player allows you to add videos to your blog.
In-Series lets you write series of posts in WordPress, without having to deal with the hassle of manually writing up tables of contents or “next” and “previous” links in each post.
Live Space Sync allows you to synchronized WordPress post to Live Spaces, facilitating MetaWeblog API.
Mini Mugshot allows you to add to a WordPress post/page the Mugshot feature of the same name.
RB Internal Links allows blog owners to easily link to posts and pages within their wordpress blog without having to enter the full URL.
Technorati Tag Cloud Widget is the widgetized version of the Technorati Tag Cloud plugin for WordPress 2.3.