Contact Form 7 Honeypot - Adds honeypot anti-spam functionality to CF7 forms.
This plugin allows you to implement Google Captcha into web forms.
This plugin protects your registered user base by preventing registration with a disposable email addresse (like the ones provided by mailinator).
This Plugin provides very simple and powerful captcha for your blog with wide variety of captcha methods and models.
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
Encode mailto links, email addresses or any text and hide them from spambots. Easy to use, plugin works directly when activated.
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.
Add Hashcash spam protection to Contact Form 7.
Bad Behavior prevents spammers from ever delivering their junk, and in many
cases, from ever reading your site in the first place.
PlusCaptcha - No more spam! Save the ecology! The world's first interactive captcha. Balance between design and safety.
To protect your Blog from automated spambots, this plugin adds invisible formfields to your comment form.
Integrates reCAPTCHA anti-spam methods with WordPress including comment, registration, and email spam protection.
Keep Your Site Happy, add Khush Captcha Anti-SpamBot Technology to your WordPress Registration and Comment Forms.
minteye - STOP SPAM, MAKE MONEY!
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