All in One SEO Pack – Allows you to create meta tags for title, description and keywords.

Podpress – For podcasters or anyone wanting to easily share mp3 recordings.

Sitemap Generator – Create an XML file to submit your site to Google and others.

Post Plugin Libary & Similar Posts – Works together to create a list of Related Posts

Share This – Provides easy way for readers to submit your content to Social Bookmarking sites and email a friend your link.

Permalink Redirect – Ensures that only one version of your post is indexed.

Comment Luv – If you want to display a link to your commenter’s most recent blog post.

What Would Seth Godin Do? – Cool plugin that recruits your readers as RSS subscribers.

RSS Footer – If someone ’scrapes’ your content to display on their blog it ensures that link(s) will be placed back to your site.

Complete RSS – Makes sure your entire post is provided in RSS feeds.

Automatic Wordpress Upgrade – Just what it says.

Google Analytics -Easy way to add Google Analytics code to your blog.

For Community Blogs:

Author Advertising – Allows you to share ad exposures with your authors.

Posts by Author – Creates list of recent posts by an author