Simple Yearly Archive is a rather neat and simple WordPress plugin that allows you to display your archives in a year-based list.
What this plugin does is to reveal most removed IDs on admin pages, as it was in versions prior to 2.5.
Adds Colorbox/Lightbox functionality to images, grouped by post or page. Works for WordPress and NextGEN galleries. Comes with different themes.
Adds version compatibility info to the plugins page to inform the admin at a glance if a plugin is compatible with the current WP version.
Changelogger shows the latest changelog right on the plugin listing page, whenever there's a plugin ready to be updated.
Audit Trail is a plugin to keep track of what is going on inside your blog by monitoring administration functions.
Sanitize filenames to latin during upload.
This plugin corrects output of comments_number for languages having more than one form of plurals (All Slavic languages for example).
Create a widget for chCounter and is bundled with the plugin. It can display all 20 output values that chCounter supports.
A simple way to manage WordPress roles and capabilities.
Asks commenters to complete a simple CAPTCHA if they don't have a previously approved comment, or if Akismet thinks their comment is spam.
Adds AJAX-driven options to some admin management pages with CMS-known functions without having to open the edit screens.
Based on the well known Subscribe-to-Comments PlugIn, but now with double-opt-in feature to prevent spam.
Include Google and OpenStreetMap maps in posts and pages, and map posts, pages, and other objects on global maps. Make WordPress into a GeoCMS.