WP Anti Spam
Solve Media CAPTCHA
Spammer Blocker
IntenseDebate Comments
WyPiekacz
WPBruiser {no- Captcha Anti-Spam}
Block Spam By Math Reloaded
PHPEnkoder
Math Comment Spam Protection
Simple Trackback Validation
Http:BL WordPress Plugin
Math Captcha
Zero Spam For WordPress
Honeypot For Contact Form 7
Cookies For Comments
Invisible Captcha
Pierre's Wordspew
Spam Master
Anti-Splog
Sucuri Security – Auditing, Malwar...
Sabre
WP-SpamShield Anti-Spam
Spam Free WordPress
Comments Evolved For WordPress
Exploit Scanner
Conditional CAPTCHA
Growmap Anti Spambot Plugin
WangGuard
