FormSpammerTrap for Contact Form 7
Adds effective form spam bot blocking to Contact Form 7 forms....
Alobaidi Captcha
Add captcha to forms easily, comment form, login form, register form, rest passw...
Smart Captcha (reCAPTCHA)
Protect WordPress website forms from spam entries with Smart reCAPTCHA....
Automatic Ban IP
Block IP addresses which are suspicious and try to post on your blog spam commen...