Simple tool to test all installed plugins using the tests provided by Theme-Check
WP Plugin Security Check checks if your WordPress plugins are 'safe'.
This plugin is to prevent your blog / website is shown on Microsoft Internet Explorer.
WordPress 3.2 will require PHP 5.2.4 and MySQL 5.0. This plugin preforms a simple check and lets you know if you're ready.
Adds extra signup options to the registration page of a BuddyPress installation.
Check if a visitor is listed on httpBL.abuse.ch, see http://dnsbl.abuse.ch/faq.php#about_httpbl for more information.
WP-LinkCheck is a lightweight plugin ability to check all image sources are broken inside your WordPress blog.
WP Version Check
Version: 1.1 This plugin allows you to check your posts for getting copied.