General Contact Form
Genaral Contact From plugin allows a wordpress admin to easily create and add contact forms…
Plugin-tag: captcha
μcaptcha
Integrates μcaptcha with WordPress, including comment and login/registration forms.
wp-login captcha
You want a captcha protected wplogin or wpadmin login? then use this plugin
Captcha Ajax
Captcha, ajax and cache. Include login, registration, lost password and comments. Include CF7, WPForms and…
woo-shortcode-popup
Creates a popup button on woocommerce shop page
PollMe
An easy to modify poll system that uses Google Charts to display the results
reCAPTCHA Login
Add reCAPTCHA to your WordPress login form
[凹凸曼]中文验证码
实现网站登录用户和注册用户的时候，显示弹层中文点击验证码，防止恶意注册，恶意内容发表，恶意评论.
QuizMe
An easy to modify quiz system
Normalized Forms with Captcha
Custom Responsive Contact, Login & Register Forms with Captcha. Redirection of Register and Login links…
Chinese Comment Spam Protection
Asks the visitor making the comment to key in the disappeared chinese word. This is…
WP Contact Form
An easy and powerful form builder that lets your visitors send you email. Blocks all…
NF Captcha
NF Captcha adds Really Simple CAPTCHA element for human check.
Logical Captcha
Integrates a logic captcha to verify that the registrant is a human and not a…
GWP-Captcha
This will add letter captcha to your register form, login form, and lostpassword form. You…
Adaptive Login Action
Adaptive Login Form: Adjusting compromise between Comfort and Paranoia.
Sargas reCAPTCHA
reCAPTCHA for login, signup, comment, WooCommerce, Mailchimp and other forms.
Numeric Captcha for WooCommerce
Numeric Captcha for WooCommerce is a plugin that adds a numeric captcha to the WooCommerce…
Ultimate Captcha reCAPTCHA Plugin for WordPress
This is a free plugin to protect your WordPress website.
Traum Captcha
CN: 最基本的形式：