NURCaptcha inserts a reCAPTCHA on the Register Form of your site to protect it against spambots.
An extremely powerful anti-spam plugin that blocks Spam-bots without annoying captcha images.
To protect your Blog from automated spambots, this plugin adds invisible formfields to your comment form.
Cryptex transforms plain-text E-Mail-Addresses into Images - automatically - No scrapers. No harvesters. No spambots. That's our goal!
This plugin protects your registered user base by preventing registration with a disposable email addresse (like the ones provided by mailinator).
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
With the release of WordPress 2.8 development of Yawasp is discontinued!!! For further protection against automated Spambots please checkout the succe