Easy way to collect user submitted content for you blog.
AdCaptcher.com enables you to build custom captchas. You need an AdCaptcher account to administrate your custom captchas.
This plugin is a simple captcha that appears when an unregistered user try to register or to leave a comment.
Provides functions to easily display and validate a reCAPTCHA
Contact Form plugin from www.123Formular.de
Lightweight package of several minor improvements for your WordPress. Why to install several plugins? You can have just this one.
CAPTCHA in Thai language.
Asks the visitor making the comment to key in the disappeared chinese word. This is intended to prove that the visitor is a human being but a spam rob
Integrates CaptchaAd anti-spam methods with WordPress including comment, registration spam protection.
Integrates SpamCaptcher anti-spam methods with WordPress including comment and registration spam protection.
This plugin creates a resistor color code captcha on comment forms
RUH Captcha helps filtering out all robot attempts to register/comment.
Last modify: 04.06.2010 DD.MM.YYYY Trumpcha is a very unique jQuery ajaxed CAPTCHA plugin that requires just one click/(mouse mmovement) instead of t
minotaur - Rid the internet of text CAPTCHAs!
The WP CaptchaCO.IN enables you to "lock" portions or complete posts/pages contents and ask for Bitcoins cryptopayment to unlock.
Integrates HappyCaptcha anti-spam methods with WordPress including comment, registration, and spam protection.
The plugin provides the next generation in captcha, BotProof Captcha 2.0, to a WordPress blog comment form. It is currently version 0.9.6.8 Beta.
Stop your WordPress website from being spammed by bots and restrict it only to humans.
We're sorry, but BotAlert/BotBlock is no longer available.
Pictcha is a very unique & secure CAPTCHA.
The AndroCaptcha - Android like Captcha for for WordPress plugin is a plugin that includes a captcha like an android lock screen on the admin login pa
figlet math challenge, captcha replacement, based on TryMath php class and phpFiglet
Windsor Zendesk Submit Ticket Form is a clean, secure, plug-n-play ticket submission form for any Zendesk account.
Innovative captcha with drag-n-drop verification and giving website owners a way to make money in the process. We deploy smart Ads on the captcha and
Photo Captcha with user defined images to reduce the spambot prize/payload to one website at a time. A captcha with "Which one of these things is not
Adds a Honeypot and a clean image captcha to Gravity Forms. Images are made using Font Awesome's font icon.
Security plugin to protect website with login captcha, hide version number and security monitor
Adds integration with Nocaptcha Mail.Ru service - free intelligent CAPTCHA service.
NF Captcha adds Really Simple CAPTCHA element for human check.
This plugin will help you to prevent auto comment spam submittions by clawlers and bots. Requires PHP5 and GD extention installed.