Dynamic Registration Links automatically changes your content links for unregistered users by dynamically changing the link target.
BackWPup allows you to backup your WordPress database, files, and more.
FoxyPress is a custom plugin made to integrate FoxyCart e-commerce functionality into your WordPress website.
Simple Facebook Connect is a framework and series of sub-systems that let you add any sort of Facebook functionality you like to a WordPress blog.
Slick Social Share Buttons allows you to add Facebook, Twitter, Google +1, Digg, Google Buzz, Linkedin, and Stumbledupon social media buttons in a floating or slide out tab.
WP Social Blogroll adds a social blogroll to your blog.
WPtouch automatically transforms your WordPress blog into an iPhone application-style theme, complete with ajax loading articles and effects, when viewed from an iPhone, iPod touch, Android, Opera Mini, Palm Pre, Samsung touch and BlackBerry Storm/Torch mobile devices.