Kills spam dead in it's tracks. Be gone evil demon spam!
This Plugin provides a Shortcode to encrypt email addresses / links and protect them against spam.
Extremely simple, 0 configuration and 0 user/admin-interaction anti-spam plugin.
Provides better email validations to protect your blog from spam comments and bots creating accounts.
Contact form with captcha plugin allows you to use a Google reCAPTCHA contact form on your blog. It requires PHP 5.0 or later.
Super Simple Anti Spam for WordPress is anti spam plugin (for comments and trackbacks), while not having to moderate and / or edit a single setting.
A lightweight plugin to protect email addresses from email-harvesting robots by encoding them into decimal and hexadecimal entities.
Blue Captcha is a powerful and highly customized WordPress plugin that effectively protects your WP blogs from spammers and unwanted persons.
minotaur - Rid the internet of text CAPTCHAs!
Simple Ajax Chat displays a fully customizable Ajax-powered chat box anywhere on your site.
This antispam plugin provides very simple(one-click) and powerful captcha for your blog.
This plugin protects your registered user base by preventing registration with a disposable email addresse (like the ones provided by mailinator).
This plugin adds a new form of captcha to your Buddy Press registration and comment forms.
Use this plugin to prevent bots from spamming your website
Protect your site with a video CAPTCHA solution that provides better security and is easier to read for your visitors.
This plugin is a simple captcha that appears when an unregistered user try to register or to leave a comment.
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