WP Advanced Math Captcha
Math Captcha is a 100% effective CAPTCHA for WordPress …
插件标签： capcha
Captcha Them All
In any online website, hackers and unscrupulous users w…
Image Captcha
An easy to use wordpress Captcha plugin to prevent spam…
Captchelfie – Captcha by Selfie
Captchelfie – Captcha by Selfie