Facebook Like for Tags converts a standard Facebook Like button from a one-time sharing feature to a one-on-one relationship for ongoing updates and sharing based on tags (keywords) or categories defined by you, the blogger/author.
LBAK Google Checkout is aimed mainly at small projects that just want to sell a few things on their blog through Google Checkout and don’t want too much else apart from ease of use.
Pingdom Status lets you display your Pingdom monitoring data on your WordPress site, essentially creating a status page for whatever it is you are monitoring.
WP Tweetbox adds a highly customizable Tweetbox at the end of blog posts and pages.
Relevanssi replaces the basic WordPress search with a partial-match search that sorts the results based on relevance.
WP-reCAPTCHA integrates reCAPTCHA anti-spam methods with WordPress including comment, registration, and email spam protection.
WP-SimpleViewer allows you to easily create SimpleViewer galleries with WordPress.
WP-Stats-Dashboard displays your blog’s stats graph plus your blog traffic, social engagement and social influence directly in your dashboard.