Search Pages
Allows your users to be able to search through posts and pages on your WordPress site/blog. Usually only posts are able to be searched.
Secure and Accessible PHP Contact Form
This powerful yet easy-to-install contact form features exceptional accessibility and usability while still providing extensive anti-spam and anti-exploit security features.
Google Sitemaps WordPress Plugin
This plugin generates a XML-Sitemap compliant sitemap of your WordPress blog. This format is supported by Google, YAHOO and MSN Search.
Feedburner Feed Replacement
Takes all your RSS feeds and puts them into one easily readable format so all readers can easily access the proper feed for their reader. Can now be found at Feedburner. While you’re there you should set up a feed. Feedburner which is now owned by Google makes using an RSS feed a breeze.
Breadcrumb Navigation
Adds a breadcrumb navigation showing the visitor’s path to their current location on your site.
More listed courtesy of Bryan Hauer
Kind Regards,
Mark