Input your own message as challenge text. It uses encrypted text and paired with matching web fonts so user will see clearly the challenge text.
Geo-Captcha shows a captcha image only to countries you don't trust. Geo-Blacklists allows you to disable comments for some countries.
Kills spam-bots, leaves humans standing. No CAPTCHAS, no math questions, no passwords, just spam blocking that stops spam-bots dead in their tracks.
Integrates HappyCaptcha anti-spam methods with WordPress including comment, registration, and spam protection.
3D objects-based CAPTCHA to get rid of spam in comments.
How to make your audience read more and Protect your blog form spam?. By displaying extracts from blog posts or simple messages in a CAPTCHA alternati
Provides a replacement for login and register and lost password and provides feature for password expiration and optional invitation codes.
Kontak is a free contact form plugin that is coded in HTML5 / CSS3 and has CAPTCHA that does not use PHP sessions. Messages are sent by email.
This plugin adds the ease of use and security of Picatcha's Pix-Captcha to your Gravity Forms in WordPress. Why settle for a difficult to use tex
With this wp antispam plugin you can stop spammers commenting on your blog with poor comments looking for links.
Gab Captcha 2 is a simple captcha plugin for fighting spam in WordPress comments.
Easy to modify Survey Form
Easy way to collect user submitted content for you blog.
An easy to modify quiz system
An easy to modify poll system that uses Google Charts to display the results
RUH Captcha helps filtering out all robot attempts to register/comment.
A simple comment captcha protection.
MP Spam Be Gone is the simplest, most effective Spam blocker.
Regular text based and hosted Captcha, better Captcha experience.
Make users Read More related posts and protect WordPress from spam. Displays extracts from blog posts or useful messages.
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
TheThe CAPTCHA is a WP plugin that blocks spam from comment boards and registration forms by generating simple tests that only humans can easily pass.
New kind of human test. Adds CAPTCHA anti-spam method to WordPress on the comment form, registration form, or both.
A simple comment spam prevention plugin.
Jax Contact form with captcha is simple plugin for your WordPress blog that enables you to have a contact form with the reCAPTCHA validation field.
BT Captcha - simple, Bilingual, Flexible, Protect Your WP Blog Against Comment Spams
Adds the ability to easily enter and display contact information.
This plugin utilizes reCAPTCHA to help your blog stay clear of spam-registrations.
防止垃圾评论插件,点击正确的图形提交评论,仿"Clickcha"(Click on the Right picture to submit comments,to prevent spam comme