Logical Captcha takes advantage of the TextCaptcha.com service, which provides logic-based textual questions instead of distorted images or audio to validate that the entity registering is a real live human being, and not a spam bot. It will provide protection against false registrations and the dreaded spam comments, etc.
An example of such a question might be:
Question: 
Out of a truck, a lion, the color purple, and the number forty-two, which has a door?
Answer: 
truck
Textual logic-based captchas mean that your registration process will be accessible to everyone, including visually/hearing impaired visitors who use access technology to surf the web. It requires a free API key from <a href="http://TextCaptcha.com" rel="nofollow ugc">TextCaptcha.com</a>
This plugin was developed by Josh de Lioncourt of <a href="http://maccessibility.net" rel="nofollow ugc">the Mac-cessibility Network</a>, a site dedicated to blind and visually impaired users of the Mac OS X operating system, the iPhone OS, and other Apple Inc. products and services. Josh de Lioncourt, the Mac-cessibility Network, and related sites are not in anyway affiliated with TextCaptcha.com

Logical Captcha

Integrates a logic captcha to verify that the registrant is a human and not a spam bot instead of using distorted images or audio.

miocene22

This simple plugin gives you the wonderful benefit of a really simple signup widget for your WordPress site to allow you to accept signups to your blog. The signup works over AJAX so no leaving the page. Registration attempts are responded to with a confirmation or error message. All input is sanitized and validated using native WordPress methods.
Those who register will be added straight to the subscribers list and given a randomly-generated password (which they can change via WordPress’s password recovery if they choose).
This is great for exporting the list for use on mailing services like MailChimp or in conjunction with another WordPress plugin to update your subscribers via email.
The widget is marked-up for Bootstrap 3 and also utilises a Font Awesome spinner icon although you can apply your own CSS as desired and these packages are not required.
You can set whether to accept a name along with email. If you opt to hide the name field then the username will be derived from the email address.

Simple Subscriber Signup Widget

Simple and effective. It took me a while to find a plugin to do exactly what I wanted.



Love it

A simple plugin to allow visitors to submit their email and name and be added to the subscribers list

Logical Captcha vs Simple Subscriber Signup Widget