Find Wordpress Plugins
Some Wordpress plugins are often updated, which is good think. Plugins that are updated are 100% compatible with last Wordpress version and they also are the most secure possible. A plugin that has not been updated for a long time might not work with last Wordpress version and might create a security breach for you website.
Prevents comment spam and fights against comment spammers by delaying their attempts
Makes it possible to duplicate a widget so it can be used more than once (i.e. in two different sidebars or two times in the same sidebar). This plugin is using the internal widget support of WordPress 2.2 and above. If you plan to use this plugin with WordPress 2.1 or below you have to download version 1.0.2 of the plugin. Version 1.0.2 and below require the Sidebar Widgets plugin from Automattic.
Adds a Google AJAX Search box on your site. Options include searching your site through Google Blog Search and/or straight up Google, a second search …
Automatically appends all your blog tags onto the end of your Google XML sitemap file.
Add show/hide text enclosed within or [spoiler][/spoiler] with a link. Original idea by Leong Wai Kay.
Replaces user-defined keywords in a blog post with the output from the corresponding user-defined PHP function.
Send email notifications to multiple addresses (not just admin) when new comments are posted on your site.
List of Posts from each Category plugin for WordPress
This plugin makes using the Google Syntax highlighter by Alex Gorbatchev to highlight code snippets within WordPress simple.