This plugin adds a security question to the Buddypress registration page.

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dmarcian displays the email authentication status of your domains directly from your admin panel.

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A simple plugin to integrate the new Invisible reCAPTCHA into your WordPress site.

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Asks the visitor making the comment to answer a simple math question. This is intended to prove that the visitor is a human being and not a spam robot …

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MP Spam Be Gone is the simplest, most effective Spam blocker.

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Stop a lot of spambots from polluting your site by making visitors identify a custom word displayed as an image before commenting.

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Automatically scatters invisible links to Project Honey Pot spam traps throughout your wordpress blog to help catch and stop spammers.

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Add honeypot anti-spam functionality to the popular woocommerce plugin.

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