This plugin will improve your experience when editing yout wp themes since it will format and highlight your source code with nice colours.
Collects Tweets based on specific Twitter usernames and hashtags and then adds them as posts
WP-URLCache allows you to use a shortcode to locally cache outgoing links in your posts and pages.
Display a word cloud representing the content of up to 200 tweets from a publicly accessible Twitter feed.
Allows crossword puzzles created by the Eclipse Crossword software (www.eclipsecrossword.com) to be published via WordPress.
Gives you a simple "Number of Fans" chicklet you can place anywhere on your
blog. Clicking on the chicklet takes users to your Facebook Page. Requires
Publishes your WordPress posts to Twitter, Facebook and MySpace.
Using Google chart API for LaTeX to add mathematical equations as images.
In the admin panel, in the upper right corner will show random plugins and a link to this plugin, where you can download it and read the detailed desc
add a mailing list signup form to your blog
Set some default options for new user accounts.
Faux Facebook Connect is a basic integration to allow Facebook users to comment on a WordPress blog.
Define the bottom edge slide-in box with any HTML/PHP globally or for each WP page/post.
The Menu Maker plugin helps in creating a menu for your site. Usually this can be used for creating a navigation menu.