InPlayer Paywall
The InPlayer Paywall plugin is a simple way for monetizing your digital content....
WP Max Submit Protect
Prevent large forms being submitted that may blow the server's field count ...
Encode Shortcode
Protect email address in your website against spam with shortcode like this : [e...
Smart Captcha (reCAPTCHA)
Protect WordPress website forms from spam entries with Smart reCAPTCHA....