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.
Set the location of the RSS and Atom feeds in options. Enables the use of services like FeedBurner without editing templates.
Inserts a quicktag toolbar on the blog comment form. js_quicktags is a slightly modified version of Alex King's newer Quicktag.js plugin modified from original found here.
The WP Unformatted plugin allows you to remove WordPress's smart quotes (texturize) and auto XHTML tags (autop) functionality on a per-post basis …
WP-PagesNav is a plugin which can be used to display a navigation bar using the static pages in your blog. When the plugin is activated, the function …
Insert YouTube videos in post using bracket method. Enables YouTube blogging to standalone wordpress setups.
Allows authors to hide portions of the WordPress interface that you seldom use. Each author's preferences are stored separately and can be edited in the author's profile. Requires WP 2.0.5 or above.
Allows you to put pages on the same permalink level as the blog's directory and to set which page you want to be the "home" page. Go to Options » Home-Page Control to adjust the settings. Works in WordPress versions 1.5+
Adds a sidebar widget that shows the most popular posts. Requires the Sidebar Widgets plugin from Automattic and the Popularity Contest plugin by Alex King.