PlusCaptcha - The Easiest Captcha to Setup and Execute, with an Auto-Setup Feature! Trusted by thousands of blog, e-commerce, and government sites!
WordPress SuperSonic with CloudFlare
Stop spam bots from registering, logging in, filling out contact forms and commenting on your site without using annoying Captcha codes or puzzles.
This plugin protects your registered user base by preventing registration with a disposable email addresse (like the ones provided by mailinator).
This Plugin provides very simple and powerful captcha for your blog with wide variety of captcha methods and models.
Captcha Booster is an effective and powerful plugin that protects you from spam, bots or automated scripts with bullet-proof validations.
Just ajax contact form with captcha, one shortcode and easy to use, without options and without complexity.
This plugin prevents comments spamming using language verification.
Provides options to disable the commenter's website and deactivate links in comments. Extra protection from spammers, best used with Akismet.
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.
No spam in the Contact Form 7.Add anti-spambot functionality to the CF7,it blocks spam without using CAPTCHA.
Simple plugin to prevent spam-bots registration on your site. Allows you to create an unique question, easy for humans, but not solvable for the bots.
Zero Spam makes blocking spam comments and registrations easy.
Block unwanted users from registering to your WordPress site with custom defined blacklist and whitelist rules.
Add Hashcash spam protection to Contact Form 7.
Adds a shortcode which converts email addresses to HTML entities to block spambots.
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.
A simple comment spam prevention plugin.
This plugin will make your blog more secure by adding rules which spambots will not pass.
Simply enables WordPress shortcode for easily letting you camouflage an email address, hiding it from crawling spiders and bots.
If you see referral spam in your analytics and would like to block it, this plugin is for you.
The Add new recaptcha google plugin allows you to implement a super security REcaptcha form into web forms.
This plugin allows you to view the full Bad Behaviour logs from within WordPress.
LIBRO DE VISITAS- GUESTBOOK is the WordPress guestbook you've just been looking for. Beautiful, responsive,easy and multi-language.
Inserts Google’s new reCAPTCHA into Infusionsoft web forms
Protect your email address from spam bots. In other words "fool the bots". With the "nospam" short code, you can call the function
SiteBrains blocks spam posts using a completely configurable set of rules. Both interactively as the user types and on our servers upon submission.
Integrates Picatcha image-identification CAPTCHA - anti-spam solution with WordPress including comment and registration.