Formidable Honeypot
Block List Updater
MASP
Formidable Anti-Spam
No Spam At All
Comment URL Control
AntiScraper
FlickRss
Mollom
WP Simple SpamCheck
Amcaptcha
Clobber Spam Users
Secure CAPTCHA
NIX Anti-Spam Light
Prevent XMLRPC
WP-Ban-User
EmailToAscii
Sucuri Security – Website Firewall...
Inpsyde AntiSpam
Content Email Anti Spam
Rot13 Email Protection
BotSmasher
Language-based Comment Spam Condom
POWr Mailing List
Google+ PlusOne Comments
BcSpamBlock
BT Captcha
Wp-num-captcha
