WordPress Theme Changer & Showcase Plugin
Plugin with a widget which enables us to change the theme of a blog without having to login to the administrator’s room first. This is just like allowing visitors to change the theme of the blog.
Plugin Central is a WordPress plugin management add-on to automatically install and update WordPress plugins. It works with WordPress 2.5+ only.
Google (XML) Sitemaps Generator
This plugin generates a XML-Sitemap compliant sitemap of your WordPress blog. This format is supported by Ask.com, Google, YAHOO and MSN Search.
The reCAPTCHA WordPress plugin uses a CAPTCHA to prevent comment spam and also uses MailHide to prevent email spam.
WPG2 is a Wordpress Plug-in that embeds Gallery2 within Wordpress to share photos, videos and any other Gallery2 content seamlessly into the Wordpress Sidebar and Blog entries.