Ozh' Admin Drop Down Menu or Standard Admin Menu + WordPress Admin Bar Fixed to the Top + Left of the Admin Screens.
Use YOURLS (a free GPL URL shortener service) or another public service (tinyURL...) to create short URLs of your posts and tweet them, or to create s
All admin links available in a neat horizontal drop down menu. Saves lots of screen real estate!
Adds icons, quick action links, and less clutter to your plugin management page.
Reply to comments from email notification
Simpler Login URL: /login instead of /wp-login.php (a Rewrite API plugin example)
Identify posts spammers find the most attractive.
Import and archive your tweets (also convert #hashtags into post tags)
Make your blog go BRRZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
Prevents spammers from duplicating legit comments but with their commenter name and URL
Manage your ads. Define under what condition they will show (visitor from search engine, old post..). Make more money.
A highly configurable badge to show off the number of comments your blog has.
Enhance feed items with anything: ads, copyright, "Add to delicious", "Read More (400 words)" links...
12Next »