WPtouch Theme {view site}
Great plugin that formats your site with a mobile theme for the Apple iPhone / iPod touch, Google Android and other touch-based smartphones.

Custom Login Page {view site}
Allows for the admin login page to be customized to reflect the overall branding of the site. This speaks loudly when logging into the admin panel.

Google Analyticator {view site}
Adds the necessary JavaScript code to enable Google’s Analytics, a powerful tool that gives you rich insights into your website traffic and marketing effectiveness. Powerful, flexible and easy-to-use features let you see and analyze your traffic data in an entirely new way.

WP-Cumulus {view site}
Allows you to display your site’s tags, categories or both using a Flash movie that rotates them in 3D. It works just like a regular tags cloud, but is more visually exciting for you visitor’s.

Sociable {view site}
Great way to automatically add links at the footer of your posts, pages and RSS feed that allows visitors to share on your favorite social networking sites.