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.
Adds the noindex meta tag to your WordPress Login page. If your WordPress blog has a public login page, you probably don't want it to be indexed …
A small script for affiliate link masking. That means all of your affiliate links in a post will automatically be changed to an internal file.
This Plugin removes all content before the tag when viewing the post by itself, but shows that text on multi-post pages.
Comment Numerical Captcha Plugins
This plugin displays the complete post list of one Author, with the total number, including the co-author participations.
Use custom fields as shortcode in post content without edit your theme files.
UserVoice makes it easy to integrate the UserVoice customer feedback system into WordPress without having to directly edit template code.
This plugin hides the comments by default and shows them on demand.
Removes unwanted tags from your WordPress header.
Widget Control helps you keep more Control of your Widgets. (Early version has limited options, see description!)